Bradycardia causes: Difference between revisions

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==Overview==
==Overview==
Pathologic bradycardias are caused by disorders of impulse generation (impaired automaticity at [[SA node]]), impulse conduction ([[heart block]]) or [[escape pacemaker]]s and rhythms. Bradycardia can be underlain by several causes, which are best divided into cardiac and non-cardiac causes or based on the location of the abnormality.
[[Pathological|Pathologic]] [[bradycardias]] are caused by disorders of impulse generation (impaired [[automaticity]] at [[SA node]]), impulse conduction ([[heart block]]), or [[escape pacemaker]]s and rhythms. [[Bradycardia]] can be underlain by several causes, which are best divided into [[cardiac]] and non-cardiac causes or based on the location of the abnormality.


==Causes==
==Causes==
*Drugs:
:*[[Agalsidase beta]]
:*[[Ambenonium]]
:*[[Aprotinin]]
:*[[Amobarbital sodium]]
:*[[Beractant]]
:*[[Bromocriptine]]
:*[[Caspofungin acetate]]
:*[[Calcium gluconate]]
:*[[Ceritinib]]
:*[[Cosyntropin]]
:*[[Crizotinib]]
:*[[Dolasetron mesylate]]
:*[[Fosphenytoin sodium ]]
:*[[Fosaprepitant]]
:*[[Lanreotide]]
:*[[Lorcaserin]]
:*[[Meropenem]]
:*[[Metipranolol]]
:*[[Nalmefene]]
:*[[Pasireotide]]
:*[[Pergolide]]
:*[[Pilocarpine]]
:*[[Poractant Alfa]]
:*[[Prednisolone]]
:*[[Secobarbital sodium]]
:*[[Sodium aurothiomalate]]
:*[[Trichophyton mentagrophytes and trichophyton rubrum]]
:*[[vandetanib]]
==Life Threatening Causes==
==Life Threatening Causes==
Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.
Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.
{{MultiCol}}
{{columns-list|
*[[Acute coronary syndrome]]
*[[Acute coronary syndrome]]
* [[Acute myocardial infarction]]
*[[Acute myocardial infarction]]
*[[Acute renal failure]]
*[[Acute renal failure]]
*[[Respiratory failure|Acute respiratory failure]]
*[[Respiratory failure|Acute respiratory failure]]
* [[Acute rheumatic fever]]
*[[Acute rheumatic fever]]
* [[Bacterial endocarditis]]
*[[Bacterial endocarditis]]
*[[Beta blockers#Adverse effects|Beta blocker overdose]]
*[[Beta blockers#Adverse effects|Beta blocker overdose]]
*[[Carbamate|Carbamate poisoning]]
*[[Carbamate|Carbamate poisoning]]
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*[[Intracranial pressure#Increased ICP|Increased intracranial pressure]]
*[[Intracranial pressure#Increased ICP|Increased intracranial pressure]]
*[[Lateral medullary syndrome]]
*[[Lateral medullary syndrome]]
{{ColBreak}}
*[[Lily of the Valley|Lily of the valley poisoning]]
*[[Lily of the Valley|Lily of the valley poisoning]]
*[[Lithium toxicity]]
*[[Lithium toxicity]]
*[[Myocardial infarction]]
*[[Myocardial infarction]]
*[[Myocardial rupture]]
*[[Myocardial rupture]]
* [[Myocarditis]]
*[[Myocarditis]]
*[[Nerve agent|Nerve agent poisoning]] e.g. [[sarin]]
*[[Nerve agent|Nerve agent poisoning]] e.g. [[sarin]]
*[[NSTEMI]]
*[[NSTEMI]]
Line 43: Line 74:
*[[Septic shock]]
*[[Septic shock]]
*[[brain damage|Severe brain injury]]
*[[brain damage|Severe brain injury]]
* [[hypothermia|Severe hypothermia]]
*[[hypothermia|Severe hypothermia]]
*[[STEMI]]
*[[STEMI]]
{{EndMultiCol}}
}}


==Common Causes==
==Common Causes==
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*[[Electrolyte imbalance]]
*[[Electrolyte imbalance]]
* [[vagus nerve|Enhanced vagal tone]]
* [[vagus nerve|Enhanced vagal tone]]
*[[Fingolimod]]
*[[First degree AV block]]
*[[First degree AV block]]
*[[Hashimoto's thyroiditis]]
*[[Hashimoto's thyroiditis]]
Line 93: Line 125:
*[[Ischemic heart disease]]
*[[Ischemic heart disease]]
*[[mitral valve sclerosis|Massive calcification of the mitral annulus]]
*[[mitral valve sclerosis|Massive calcification of the mitral annulus]]
*Medications ( e.g. [[adenosine]], [[amiodarone]], [[beta-blockers]], [[diltiazem]], [[procainamide]], [[verapamil]])
*Medications ( e.g. [[adenosine]], [[amiodarone]], [[beta-blockers]], [[diltiazem]], [[metoclopramide]], [[procainamide]], [[verapamil]], [[fingolimod]])
*[[Methylprednisolone]]
*[[Methylprednisolone]]
*[[Myocardial infarction]] <ref name="pmid18274563">{{cite journal |author=Malla RR, Sayami A |title=In hospital complications and mortality of patients of inferior wall myocardial infarction with right ventricular infarction |journal=JNMA J Nepal Med Assoc |volume=46 |issue=167 |pages=99–102 |year=2007 |pmid=18274563 |doi= |url=}}</ref>
*[[Myocardial infarction]] <ref name="pmid18274563">{{cite journal |author=Malla RR, Sayami A |title=In hospital complications and mortality of patients of inferior wall myocardial infarction with right ventricular infarction |journal=JNMA J Nepal Med Assoc |volume=46 |issue=167 |pages=99–102 |year=2007 |pmid=18274563 |doi= |url=}}</ref>
*[[Myocarditis]]
* [[Myocarditis]]
*[[Nausea]]
* [[Nausea]]
* [[PR interval|Normal variants]]
* [[PR interval|Normal variants]]
*Normal variation in vagal tone
* Normal variation in vagal tone
*[[NSTEMI]]
* [[NSTEMI]]
*[[Obstructive sleep apnea]]
* [[Octreotide]]
*[[organophosphate|Organophosphate poisoning]]
* [[Obstructive sleep apnea]]
* [[organophosphate|Organophosphate poisoning]]
* [[chest trauma|Penetrating and non-penetrating trauma of the chest]]
* [[chest trauma|Penetrating and non-penetrating trauma of the chest]]
*[[Pericarditis]]
* [[Pericarditis]]
*[[Phenytoin]]
* [[Phenobarbital]]
*[[Premature atrial contractions]]
* [[Phenytoin]]
*[[Renal failure]]
* [[Premature atrial contractions]]
* [[Renal failure]]
* [[Lev's disease|Sclerodegenerative disease of the electrical conduction system]]
* [[Lev's disease|Sclerodegenerative disease of the electrical conduction system]]
*[[Second degree AV block]]
* [[Second degree AV block]]
*[[Sedative]]
* [[Sedative]]
*[[Sepsis]]
* [[Sepsis]]
*[[brain damage|Severe brain injury]]
* [[brain damage|Severe brain injury]]
*[[Sick sinus syndrome]]
* [[Sick sinus syndrome]]
*[[Sinus arrest]]
* [[Sinus arrest]]
*[[Sinus bradycardia]]
* [[Sinus bradycardia]]
*[[sinus node disease|Sinus node fibrosis]]
* [[sinus node disease|Sinus node fibrosis]]
*[[Sleep]]
* [[Sleep]]
*[[STEMI]]
* [[STEMI]]
*[[Systemic lupus erythematosus]]
* [[Systemic lupus erythematosus]]
*[[Valvular heart disease]]
* [[Valvular heart disease]]
*[[Verapamil]]
* [[Verapamil]]
{{col-end}}
{{col-end}}
==Causes by Organ System==
{| style="width:80%; height:100px" border="1"
| style="width:25%" bgcolor="LightSteelBlue" ; border="1" |'''Cardiovascular'''
| style="width:75%" bgcolor="Beige" ; border="1" |[[Acute coronary syndrome]],  [[Acute myocardial infarction]],  [[Acute rheumatic fever]],  [[Andersen cardiodysrhythmic periodic paralysis]],  [[Aspergillosis myocarditis]],  [[Atherosclerosis]],  [[Atrial septal defect]],  [[Atrioventricular block]],  [[Brugada syndrome]],  [[Calcific aortic stenosis]],  [[Cardiac arrhythmia]],  [[Cardiac catheterization]],  [[Cardiac glycosides]],  [[Cardiac transplantation]],  [[Cardiac tumor]],  [[Cardioinhibitory syncope]],  [[Cardiomyopathy]],  [[Cardioversion]],  [[Carotid sinus hypersensitivity]],  [[Complete heart block]],  [[Congenital heart block]],  [[Congenital heart disease]],  [[Congestive heart failure]],  [[Coronary artery bypass grafting]],  [[Coronary heart disease]],  [[Coronary ischemia]],  [[Coronary reperfusion therapy]],  [[Diabetes mellitus]],  [[Dilated cardiomyopathy]],  [[Ebstein’s anomaly]],  [[Electrophysiological studies]],  [[Endocardial cushion defect]],  [[Endocarditis]],  [[Enhanced vagal tone]],  [[Fontan procedure]],  [[High fitness level]],  [[Hypersensitive carotid sinus syndrome]],  [[Hypertension]],  [[Hypertensive heart disease]],  [[Hypertrophic cardiomyopathy alcohol septal ablation]],  [[Hypertrophic cardiomyopathy]],  [[Hypervagotonia]],  [[Idiopathic heart block]],  [[Idiopathic hypereosinophilic syndrome]],  [[Infraclavicular brachial plexus block]],  [[Ischemic heart disease]],  [[Isorhythmic a-v dissociation]],  [[Jervell and lange-nielsen syndrome]],  [[Junctional rhythms]],  [[Lateral medullary syndrome]],  [[Left ventricular noncompaction]],  [[Lenegre's disease]],  [[Lev's disease]],  [[Long qt syndrome]],  [[Lown-ganong-levine syndrome]],  [[Lqt type 4]],  [[Lqt4 mutation]],  [[Mahaim fiber tachycardia]],  [[Maze procedure]],  [[Micturition syncope]],  [[Mitral regurgitation]],  [[Mitral stenosis]],  [[Mitral valve prolapse]],  [[Myocardial bridging]],  [[Myocardial contusion]],  [[Myocardial infarction ]] ,  [[Myocardial ischaemia]],  [[Myocardial rupture]],  [[Myocarditis]],  [[Neurocardiogenic syncope]],  [[Noncompaction cardiomyopathy]],  [[Normal variants of pr prolongation]],  [[Normal variation in vagal tone]],  [[Nstemi]],  [[Pacemaker malfunction]],  [[Paroxysmal supraventricular tachycardia]],  [[Pericarditis]],  [[Permanent pacemaker]],  [[Peroneal muscular atrophy]],  [[Post aortic valve replacement]],  [[Post catheter ablation for arrhythmias]],  [[Post closure of a ventricular septal defect]],  [[Post mitral valve replacement]],  [[Preexcitation syndrome]],  [[Premature atrial beats]],  [[Pulmonary embolism]],  [[Pulmonary stenosis]],  [[Restrictive cardiomyopathy]],  [[Rheumatic mitral valve disease]],  [[Romano-ward syndrome]],  [[Sick sinus syndrome]],  [[Sinoatrial block]],  [[Sinus arrest]],  [[Sinus bradycardia]],  [[Sinus node disease]],  [[Sinus node fibrosis]],  [[Stemi]],  [[Subarachnoid hemorrhage]],  [[Sustained ventricular tachycardia]],  [[Tachycardia-bradycardia syndrome]],  [[Takotsubo cardiomyopathy]],  [[Tetralogy of fallot]],  [[Tilt testing]],  [[Timothy syndrome]],  [[Trained athletes]],  [[Transcatheter aortic valve implantation]],  [[Transposition of the great vessels]],  [[Vagal maneuvers]],  [[Vagal reaction]],  [[Valsalva maneuver]],  [[Valvular heart disease]],  [[Vasovagal syncope]],  [[Ventricular septal defect]],  [[Wolff-parkinson-white syndrome]]
|-
| bgcolor="LightSteelBlue" |'''Chemical/Poisoning'''
| bgcolor="Beige" |[[5-fluorouracil]],  [[Alcohol intoxication]],  [[All-trans retinoic acid]],  [[Carbamate poisoning]],  [[Carbamates]],  [[Crizotinib toxicity]],  [[Digitalis]],  [[Dimethyl sulfoxide]],  [[Disopyramide]],  [[Fentanyl]],  [[Heart block]],  [[Heart surgery]],  [[Heat exhaustion]],  [[Isoprenaline infusion]],  [[Lily of the valley poisoning]],  [[Magnesium]],  [[Organophosphate poisoning]],  [[Parathion poisoning]],  [[Poisonous spider bites]],  [[Pyrethroid poisoning]],  [[Scorpion toxin]],  [[Toluene sniffing]]
|-
|- bgcolor="LightSteelBlue"
|'''Dental'''
| bgcolor="Beige" |No underlying causes
|-
|- bgcolor="LightSteelBlue"
|'''Dermatologic'''
| bgcolor="Beige" |[[Dermatomyositis]],  [[Obstructive jaundice]]
|-
|- bgcolor="LightSteelBlue"
|'''Drug Side Effect'''
| bgcolor="Beige" |[[Acetylcholine]],  [[Alfentanil]],  [[Ambenonium]],  [[Amiodarone]],  [[Amlodipine]],  [[Amphetamines]],  [[Anidulafungin]],  [[Anthracyclines]],  [[Antiarrhythmic drugs]],  [[Atenolol]],  [[Atetylcholine]],  [[Barbiturate]],  [[Berberine]],  [[Beta-blockers]],  [[Bethanechol]],  [[Bortezomib]],  [[Bupivacaine]],  [[Calcium channel blocker]],  [[Cannabis]],  [[Carbamazepine]],  [[Celecoxib]],  [[Ceritinib]],  [[Certain medications]],  [[Cilobradine]],  [[Cimetidine]],  [[Citalopram]],  [[Clonidine]],  [[Cocaine]],  [[Dapoxetine]],  [[Daunorubicin]],  [[Deserpidine]],  [[Dexmedetomidine]],  [[Digoxin]],  [[Diltiazem]],  [[Diphenhydramine]],  [[Distigmine]],  [[Dobutamine]],  [[Dolasetron]],  [[Donepezil]],  [[Doxorubicin]],  [[Dronedarone]],  [[Drugs]],  [[Edrophonium]],  [[Ephedrine]],  [[Epirubicin]],  [[Eslicarbazepine acetate]],  [[Febuxostat]],  [[Fesoterodine]],  [[Fingolimod]],  [[Flecainide]],  [[Flumazenil]],  [[Fluoxetine]],  [[Fluvoxamine]],  [[Fosphenytoin]],  [[Granisetron]],  [[Grayanotoxin]],  [[Guanethidine]],  [[Guanfacine]],  [[H2 receptor antagonist]],  [[Halothane]],  [[Hyoscyamine]],  [[Ibutilide]],  [[Idarubicin]],  [[Isoproterenol]],  [[Ivabradine]],  [[Labetalol]],  [[Lacosamide]],  [[Lanatoside c]],  [[Lanreotide]],  [[Lidocaine]],  [[Lithium]],  [[Lofexidine]],  [[Medications]],  [[Mefloquine]],  [[Mepivacaine]],  [[Mesalamine]],  [[Methyldopa]],  [[Methylprednisolone]],  [[Mexiletine]],  [[Morphine]],  [[Muscarine]],  [[Nadolol]],  [[Nefazodone]],  [[Nelfinavir]],  [[Neostigmine]],  [[Nerve agent]],  [[Nicorandil]],  [[Paclitaxel]],  [[Paliperidone]],  [[Palonosetron]],  [[Phenothiazine]],  [[Phenylephrine]],  [[Phenytoin]],  [[Physostigmine]],  [[Procainamide]],  [[Propafenone]],  [[Propanolol]],  [[Propofol]],  [[Propoxyphene]],  [[Propranolol]],  [[Pyridostigmine]],  [[Quinidine]],  [[Rabeprazole]],  [[Regadenoson]],  [[Remifentanil]],  [[Rescinnamine]],  [[Reserpine]],  [[Rilmenidine]],  [[Ropivacaine]],  [[Salbutamol]],  [[Sedative]],  [[Somatostatin]],  [[Sotalol]],  [[Sufentanil]],  [[Suxamethonium]],  [[Sympathomimetic agents]],  [[Tacrine]],  [[Tacrolimus]],  [[Terodiline]],  [[Theophylline]],  [[Thiamylal]],  [[Thiazides]],  [[Timolol]],  [[Tolterodine]],  [[Topical cocaine]],  [[Tramadol]],  [[Tricyclic antidepressants]],  [[Urapidil]],  [[Vecuronium]],  [[Verapamil]],  [[Veratridine (false hellebore)]],  [[Zaleplon]],  [[Zatebradine]]
|-
|- bgcolor="LightSteelBlue"
|'''Ear Nose Throat'''
| bgcolor="Beige" |[[Esophageal or nasopharyngeal stimulation]],  [[Sjogren's syndrome]]
|-
|- bgcolor="LightSteelBlue"
|'''Endocrine'''
| bgcolor="Beige" |[[Cretinism]],  [[Cushing's syndrome]],  [[Hashimoto's thyroiditis]],  [[Hyperthyroidism]],  [[Hypothyroidism]],  [[Myxedema]],  [[Profound hypothyroidism]],  [[Thyrotoxic periodic paralysis]],  [[Thyrotoxicosis]]
|-
|- bgcolor="LightSteelBlue"
|'''Environmental'''
| bgcolor="Beige" |No underlying causes
|-
|- bgcolor="LightSteelBlue"
|'''Gastroenterologic'''
| bgcolor="Beige" |[[Nausea]], [[Vomiting]]
|-
|- bgcolor="LightSteelBlue"
|'''Genetic'''
| bgcolor="Beige" |[[Becker muscular dystrophy]],  [[Fabry disease]],  [[Hcm]],  [[Hcn4 mutation]],  [[Hereditary neuromuscular disease]],  [[Jervell and lange-nielsen syndrome]],  [[Kearns-sayre syndrome]],  [[Mitochondrial genome inherited conditions]],  [[Nail-patella syndrome]],  [[Scn5a mutation]],  [[Timothy syndrome]],  [[X-linked inherited conditions]]
|-
|- bgcolor="LightSteelBlue"
|'''Hematologic'''
| bgcolor="Beige" |[[Anemia]],  [[Churg-strauss syndrome]],  [[Hemochromatosis]],  [[Hypercalcemia]],  [[Hypercapnia]],  [[Hyperkalemia]],  [[Hypermagnesemia]],  [[Hypocalcemia]],  [[Hypoglycemia]],  [[Hypokalemia]],  [[Hypomagnesemia]],  [[Hypoxia]],  [[Sepsis]],  [[Thalassemia major]]
|-
|- bgcolor="LightSteelBlue"
|'''Iatrogenic'''
| bgcolor="Beige" |No underlying causes
|-
|- bgcolor="LightSteelBlue"
|'''Infectious Disease'''
| bgcolor="Beige" |[[Aspergillosis myocarditis]],  [[Brucellosis]],  [[Chagas disease]],  [[Dengue fever]],  [[Diptheria]],  [[Legionellosis]],  [[Leptospirosis]],  [[Lyme disease]],  [[Malaria]],  [[Meningitis]],  [[Pneumonia]],  [[Protozoal infection]],  [[Q fever]],  [[Rabies]],  [[Rocky mountain spotted fever]],  [[Salmonellosis]],  [[Sepsis]],  [[Septic shock]],  [[Trichinosis]],  [[Tuberculosis]],  [[Typhoid fever]],  [[Typhus]],  [[Varicella zoster]],  [[Viral hemorrhagic fever]],  [[Yellow fever]]
|-
|- bgcolor="LightSteelBlue"
|'''Musculoskeletal/Orthopedic'''
| bgcolor="Beige" |[[Arnold-chiari malformation]],  [[Dermatomyositis]],  [[Duchenne's muscular dystrophy]],  [[Emery-dreifuss muscular dystrophy, x-linked]],  [[Erb's dystrophy]],  [[Hereditary neuromuscular disease]],  [[Limb-girdle muscular dystrophy type 1b (lgmd1b)]],  [[Mitochondrial myopathy]],  [[Muscular dystrophy]],  [[Myotonic dystrophy]],  [[Myotonic muscular dystrophy]]
|-
|- bgcolor="LightSteelBlue"
|'''Neurologic'''
| bgcolor="Beige" |[[Bezold-jarisch reflex]],  [[Degenerative diseases]],  [[Diabetic neuropathy]],  [[Epilepsy]],  [[Friedreich ataxia]],  [[Increased intracranial pressure]],  [[Miller-dieker syndrome]],  [[Neurocardiogenic syncope]],  [[Raised intracranial pressure]],  [[Severe brain injury]],  [[Sleep apnea]],  [[Sleep]],  [[Timothy syndrome]]
|-
|- bgcolor="LightSteelBlue"
|'''Nutritional/Metabolic'''
| bgcolor="Beige" |[[Cerebral edema]],  [[Diabetes mellitus]],  [[Diabetic ketoacidosis]],  [[Diabetic neuropathy]],  [[Glycogen storage disease type ii]],  [[Glycogenosis type 2b]],  [[Hypoglycemia]],  [[Kwashiorkor]],  [[Malnutrition]],  [[Metabolic acidosis]],  [[Obesity]],  [[Pompe disease]],  [[Severe anorexia nervosa]],  [[Starvation]],  [[Very low birth weight infants]]
|-
|- bgcolor="LightSteelBlue"
|'''Obstetric/Gynecologic'''
| bgcolor="Beige" |[[Fetal distress]],  [[Pregnancy]]
|-
|- bgcolor="LightSteelBlue"
|'''Oncologic'''
| bgcolor="Beige" |[[Hodgkin disease]],  [[Hodgkin lymphoma]],  [[Multiple myeloma]],  [[Pheochromocytoma]],  [[Tumor lysis syndrome]],  [[Tumor]]
|-
|- bgcolor="LightSteelBlue"
|'''Ophthalmologic'''
| bgcolor="Beige" |No underlying causes
|-
|- bgcolor="LightSteelBlue"
|'''Overdose/Toxicity'''
| bgcolor="Beige" |No underlying causes
|-
|- bgcolor="LightSteelBlue"
|'''Psychiatric'''
| bgcolor="Beige" |[[Anorexia nervosa]],  [[Severe anorexia nervosa]]
|-
|- bgcolor="LightSteelBlue"
|'''Pulmonary'''
| bgcolor="Beige" |[[Acute respiratory failure]], [[Altitude sickness]], [[Breath holding spells]], [[Chronic obstructive pulmonary disease]], [[Cough syncope]], [[Decompression sickness]], [[Drowning]], [[Obstructive sleep apnea]], [[Post lung transplantation]], [[Pulmonary embolism]], [[Pulmonary stenosis]], [[Sarcoidosis]], [[Sleep apnea]], [[Tuberculosis]]
|-
|- bgcolor="LightSteelBlue"
|'''Renal/Electrolyte'''
| bgcolor="Beige" |[[Acute renal failure]], [[Amyloidosis]], [[Chronic renal failure]], [[Electrolyte disturbances]], [[Hyperkalemia]], [[Hypokalemia]], [[Renal failure]]
|-
|- bgcolor="LightSteelBlue"
|'''Rheumatology/Immunology/Allergy'''
| bgcolor="Beige" |[[Acute rheumatic fever]], [[Ankylosing spondylitis]], [[Churg-strauss syndrome]], [[Neonatal lupus erythematosus]], [[Reiter's syndrome]], [[Relapsing polychondritis]], [[Rheumatic fever]], [[Rheumatic mitral valve disease]], [[Rheumatoid arthritis]], [[Sarcoidosis]], [[Scleroderma]], [[Sinus node fibrosis]], [[Sjogren's syndrome]], [[Systemic lupus erythematosus]], [[Systemic sclerosis]]
|-
|- bgcolor="LightSteelBlue"
|'''Sexual'''
| bgcolor="Beige" |No underlying causes
|-
|- bgcolor="LightSteelBlue"
|'''Trauma'''
| bgcolor="Beige" |[[Cervical spine injury]], [[Electric shock]], [[Hypothermia]], [[Pain]], [[Septic shock]], [[Severe brain injury]], [[Spinal cord injury, acute]], [[Starvation]], [[Surgical trauma]], [[Trauma]]
|-
|- bgcolor="LightSteelBlue"
|'''Urologic'''
| bgcolor="Beige" |No underlying causes
|-
|- bgcolor="LightSteelBlue"
|'''Miscellaneous'''
| bgcolor="Beige" |[[Aging]],  [[Defecation]],  [[Idiopathic]]
|-
|}


==Causes Based on Pathophysiologic Origin of Impulse==
==Causes Based on Pathophysiologic Origin of Impulse==
===From the Atria===
===From the Atria===
====Respiratory Sinus Arrhythmia====
====Respiratory Sinus Arrhythmia====
*[[Anidulafungin]]
*[[Anidulafungin]]
*[[Atherosclerosis]]
*[[Atherosclerosis]]
Line 223: Line 372:
*[[Mefloquine]]
*[[Mefloquine]]
*[[Meningitis]]
*[[Meningitis]]
*[[Methocarbamol]]
*[[Methyldopa]]
*[[Methyldopa]]
*[[Mexiletine]]
*[[Mexiletine]]
Line 826: Line 976:
*[[Cholinesterase inhibitor]]
*[[Cholinesterase inhibitor]]
*[[Churg-Strauss syndrome]])<ref name="pmid20979789">{{cite journal |author=Tian Z, Fang Q, Zhao DC, ''et al.'' |title=[The clinico-pathological manifestation of cardiac involvement in eosinophilic diseases] |language=Chinese |journal=Zhonghua Nei Ke Za Zhi |volume=49 |issue=8 |pages=684–7 |year=2010 |month=August |pmid=20979789 |doi= |url=}}</ref>,
*[[Churg-Strauss syndrome]])<ref name="pmid20979789">{{cite journal |author=Tian Z, Fang Q, Zhao DC, ''et al.'' |title=[The clinico-pathological manifestation of cardiac involvement in eosinophilic diseases] |language=Chinese |journal=Zhonghua Nei Ke Za Zhi |volume=49 |issue=8 |pages=684–7 |year=2010 |month=August |pmid=20979789 |doi= |url=}}</ref>,
*[[Congenital heart block]]<ref name="www.ncbi.nlm.nih.gov">{{Cite web  | last = | first =  | title = Congenital complete atrioventricular block. | url = http://www.ncbi.nlm.nih.gov/pmc/articles/PMC325472/ | publisher = | date | accessdate = 21 August 2013 }}</ref>
*[[Congenital heart block]]<ref name="pmid9456483">{{cite journal| author=Kertesz NJ, Fenrich AL, Friedman RA| title=Congenital complete atrioventricular block. | journal=Tex Heart Inst J | year= 1997 | volume= 24 | issue= 4 | pages= 301-7 | pmid=9456483 | doi= | pmc=325472 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9456483 }} </ref>
*[[Coronary ischemia]]
*[[Coronary ischemia]]
*[[Degenerative diseases]]
*[[Degenerative diseases]]

Latest revision as of 14:55, 23 September 2020

Bradycardia Microchapters

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Risk calculators and risk factors for Bradycardia causes

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: M.Umer Tariq [2]; Ogheneochuko Ajari, MB.BS, MS [3]

Overview

Pathologic bradycardias are caused by disorders of impulse generation (impaired automaticity at SA node), impulse conduction (heart block), or escape pacemakers and rhythms. Bradycardia can be underlain by several causes, which are best divided into cardiac and non-cardiac causes or based on the location of the abnormality.

Causes

  • Drugs:

Life Threatening Causes

Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.

Common Causes

Causes by Organ System

Cardiovascular Acute coronary syndrome, Acute myocardial infarction, Acute rheumatic fever, Andersen cardiodysrhythmic periodic paralysis, Aspergillosis myocarditis, Atherosclerosis, Atrial septal defect, Atrioventricular block, Brugada syndrome, Calcific aortic stenosis, Cardiac arrhythmia, Cardiac catheterization, Cardiac glycosides, Cardiac transplantation, Cardiac tumor, Cardioinhibitory syncope, Cardiomyopathy, Cardioversion, Carotid sinus hypersensitivity, Complete heart block, Congenital heart block, Congenital heart disease, Congestive heart failure, Coronary artery bypass grafting, Coronary heart disease, Coronary ischemia, Coronary reperfusion therapy, Diabetes mellitus, Dilated cardiomyopathy, Ebstein’s anomaly, Electrophysiological studies, Endocardial cushion defect, Endocarditis, Enhanced vagal tone, Fontan procedure, High fitness level, Hypersensitive carotid sinus syndrome, Hypertension, Hypertensive heart disease, Hypertrophic cardiomyopathy alcohol septal ablation, Hypertrophic cardiomyopathy, Hypervagotonia, Idiopathic heart block, Idiopathic hypereosinophilic syndrome, Infraclavicular brachial plexus block, Ischemic heart disease, Isorhythmic a-v dissociation, Jervell and lange-nielsen syndrome, Junctional rhythms, Lateral medullary syndrome, Left ventricular noncompaction, Lenegre's disease, Lev's disease, Long qt syndrome, Lown-ganong-levine syndrome, Lqt type 4, Lqt4 mutation, Mahaim fiber tachycardia, Maze procedure, Micturition syncope, Mitral regurgitation, Mitral stenosis, Mitral valve prolapse, Myocardial bridging, Myocardial contusion, Myocardial infarction  , Myocardial ischaemia, Myocardial rupture, Myocarditis, Neurocardiogenic syncope, Noncompaction cardiomyopathy, Normal variants of pr prolongation, Normal variation in vagal tone, Nstemi, Pacemaker malfunction, Paroxysmal supraventricular tachycardia, Pericarditis, Permanent pacemaker, Peroneal muscular atrophy, Post aortic valve replacement, Post catheter ablation for arrhythmias, Post closure of a ventricular septal defect, Post mitral valve replacement, Preexcitation syndrome, Premature atrial beats, Pulmonary embolism, Pulmonary stenosis, Restrictive cardiomyopathy, Rheumatic mitral valve disease, Romano-ward syndrome, Sick sinus syndrome, Sinoatrial block, Sinus arrest, Sinus bradycardia, Sinus node disease, Sinus node fibrosis, Stemi, Subarachnoid hemorrhage, Sustained ventricular tachycardia, Tachycardia-bradycardia syndrome, Takotsubo cardiomyopathy, Tetralogy of fallot, Tilt testing, Timothy syndrome, Trained athletes, Transcatheter aortic valve implantation, Transposition of the great vessels, Vagal maneuvers, Vagal reaction, Valsalva maneuver, Valvular heart disease, Vasovagal syncope, Ventricular septal defect, Wolff-parkinson-white syndrome
Chemical/Poisoning 5-fluorouracil, Alcohol intoxication, All-trans retinoic acid, Carbamate poisoning, Carbamates, Crizotinib toxicity, Digitalis, Dimethyl sulfoxide, Disopyramide, Fentanyl, Heart block, Heart surgery, Heat exhaustion, Isoprenaline infusion, Lily of the valley poisoning, Magnesium, Organophosphate poisoning, Parathion poisoning, Poisonous spider bites, Pyrethroid poisoning, Scorpion toxin, Toluene sniffing
Dental No underlying causes
Dermatologic Dermatomyositis, Obstructive jaundice
Drug Side Effect Acetylcholine, Alfentanil, Ambenonium, Amiodarone, Amlodipine, Amphetamines, Anidulafungin, Anthracyclines, Antiarrhythmic drugs, Atenolol, Atetylcholine, Barbiturate, Berberine, Beta-blockers, Bethanechol, Bortezomib, Bupivacaine, Calcium channel blocker, Cannabis, Carbamazepine, Celecoxib, Ceritinib, Certain medications, Cilobradine, Cimetidine, Citalopram, Clonidine, Cocaine, Dapoxetine, Daunorubicin, Deserpidine, Dexmedetomidine, Digoxin, Diltiazem, Diphenhydramine, Distigmine, Dobutamine, Dolasetron, Donepezil, Doxorubicin, Dronedarone, Drugs, Edrophonium, Ephedrine, Epirubicin, Eslicarbazepine acetate, Febuxostat, Fesoterodine, Fingolimod, Flecainide, Flumazenil, Fluoxetine, Fluvoxamine, Fosphenytoin, Granisetron, Grayanotoxin, Guanethidine, Guanfacine, H2 receptor antagonist, Halothane, Hyoscyamine, Ibutilide, Idarubicin, Isoproterenol, Ivabradine, Labetalol, Lacosamide, Lanatoside c, Lanreotide, Lidocaine, Lithium, Lofexidine, Medications, Mefloquine, Mepivacaine, Mesalamine, Methyldopa, Methylprednisolone, Mexiletine, Morphine, Muscarine, Nadolol, Nefazodone, Nelfinavir, Neostigmine, Nerve agent, Nicorandil, Paclitaxel, Paliperidone, Palonosetron, Phenothiazine, Phenylephrine, Phenytoin, Physostigmine, Procainamide, Propafenone, Propanolol, Propofol, Propoxyphene, Propranolol, Pyridostigmine, Quinidine, Rabeprazole, Regadenoson, Remifentanil, Rescinnamine, Reserpine, Rilmenidine, Ropivacaine, Salbutamol, Sedative, Somatostatin, Sotalol, Sufentanil, Suxamethonium, Sympathomimetic agents, Tacrine, Tacrolimus, Terodiline, Theophylline, Thiamylal, Thiazides, Timolol, Tolterodine, Topical cocaine, Tramadol, Tricyclic antidepressants, Urapidil, Vecuronium, Verapamil, Veratridine (false hellebore), Zaleplon, Zatebradine
Ear Nose Throat Esophageal or nasopharyngeal stimulation, Sjogren's syndrome
Endocrine Cretinism, Cushing's syndrome, Hashimoto's thyroiditis, Hyperthyroidism, Hypothyroidism, Myxedema, Profound hypothyroidism, Thyrotoxic periodic paralysis, Thyrotoxicosis
Environmental No underlying causes
Gastroenterologic Nausea, Vomiting
Genetic Becker muscular dystrophy, Fabry disease, Hcm, Hcn4 mutation, Hereditary neuromuscular disease, Jervell and lange-nielsen syndrome, Kearns-sayre syndrome, Mitochondrial genome inherited conditions, Nail-patella syndrome, Scn5a mutation, Timothy syndrome, X-linked inherited conditions
Hematologic Anemia, Churg-strauss syndrome, Hemochromatosis, Hypercalcemia, Hypercapnia, Hyperkalemia, Hypermagnesemia, Hypocalcemia, Hypoglycemia, Hypokalemia, Hypomagnesemia, Hypoxia, Sepsis, Thalassemia major
Iatrogenic No underlying causes
Infectious Disease Aspergillosis myocarditis, Brucellosis, Chagas disease, Dengue fever, Diptheria, Legionellosis, Leptospirosis, Lyme disease, Malaria, Meningitis, Pneumonia, Protozoal infection, Q fever, Rabies, Rocky mountain spotted fever, Salmonellosis, Sepsis, Septic shock, Trichinosis, Tuberculosis, Typhoid fever, Typhus, Varicella zoster, Viral hemorrhagic fever, Yellow fever
Musculoskeletal/Orthopedic Arnold-chiari malformation, Dermatomyositis, Duchenne's muscular dystrophy, Emery-dreifuss muscular dystrophy, x-linked, Erb's dystrophy, Hereditary neuromuscular disease, Limb-girdle muscular dystrophy type 1b (lgmd1b), Mitochondrial myopathy, Muscular dystrophy, Myotonic dystrophy, Myotonic muscular dystrophy
Neurologic Bezold-jarisch reflex, Degenerative diseases, Diabetic neuropathy, Epilepsy, Friedreich ataxia, Increased intracranial pressure, Miller-dieker syndrome, Neurocardiogenic syncope, Raised intracranial pressure, Severe brain injury, Sleep apnea, Sleep, Timothy syndrome
Nutritional/Metabolic Cerebral edema, Diabetes mellitus, Diabetic ketoacidosis, Diabetic neuropathy, Glycogen storage disease type ii, Glycogenosis type 2b, Hypoglycemia, Kwashiorkor, Malnutrition, Metabolic acidosis, Obesity, Pompe disease, Severe anorexia nervosa, Starvation, Very low birth weight infants
Obstetric/Gynecologic Fetal distress, Pregnancy
Oncologic Hodgkin disease, Hodgkin lymphoma, Multiple myeloma, Pheochromocytoma, Tumor lysis syndrome, Tumor
Ophthalmologic No underlying causes
Overdose/Toxicity No underlying causes
Psychiatric Anorexia nervosa, Severe anorexia nervosa
Pulmonary Acute respiratory failure, Altitude sickness, Breath holding spells, Chronic obstructive pulmonary disease, Cough syncope, Decompression sickness, Drowning, Obstructive sleep apnea, Post lung transplantation, Pulmonary embolism, Pulmonary stenosis, Sarcoidosis, Sleep apnea, Tuberculosis
Renal/Electrolyte Acute renal failure, Amyloidosis, Chronic renal failure, Electrolyte disturbances, Hyperkalemia, Hypokalemia, Renal failure
Rheumatology/Immunology/Allergy Acute rheumatic fever, Ankylosing spondylitis, Churg-strauss syndrome, Neonatal lupus erythematosus, Reiter's syndrome, Relapsing polychondritis, Rheumatic fever, Rheumatic mitral valve disease, Rheumatoid arthritis, Sarcoidosis, Scleroderma, Sinus node fibrosis, Sjogren's syndrome, Systemic lupus erythematosus, Systemic sclerosis
Sexual No underlying causes
Trauma Cervical spine injury, Electric shock, Hypothermia, Pain, Septic shock, Severe brain injury, Spinal cord injury, acute, Starvation, Surgical trauma, Trauma
Urologic No underlying causes
Miscellaneous Aging, Defecation, Idiopathic

Causes Based on Pathophysiologic Origin of Impulse

From the Atria

Respiratory Sinus Arrhythmia

Sinus bradycardia

Sinoatrial block

Sinus arrest

Sick sinus syndrome


First degree AV block

Second degree AV block

Complete or third-degree AV block

Short PR interval

From the AV junction

Junctional bradycardia

From the Ventricles

Isorhythmic A-V dissociation

Idioventricular rhythm

Ventricular escape beat

Combined List of Causes in Alphabetical Order

References

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