Sinus bradycardia

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Sinus bradycardia Classification and external resources
Sinus bradycardia.
ICD-9	427.81
eMedicine	emerg/
MeSH	D001146

WikiDoc Resources for Sinus bradycardia
Articles
Most recent articles on Sinus bradycardia Most cited articles on Sinus bradycardia Review articles on Sinus bradycardia Articles on Sinus bradycardia in N Eng J Med, Lancet, BMJ
Media
Powerpoint slides on Sinus bradycardia Images of Sinus bradycardia Photos of Sinus bradycardia Podcasts & MP3s on Sinus bradycardia Videos on Sinus bradycardia
Evidence Based Medicine
Cochrane Collaboration on Sinus bradycardia Bandolier on Sinus bradycardia TRIP on Sinus bradycardia
Clinical Trials
Ongoing Trials on Sinus bradycardia at Clinical Trials.gov Trial results on Sinus bradycardia Clinical Trials on Sinus bradycardia at Google
Guidelines / Policies / Govt
US National Guidelines Clearinghouse on Sinus bradycardia NICE Guidance on Sinus bradycardia NHS PRODIGY Guidance FDA on Sinus bradycardia CDC on Sinus bradycardia
Books
Books on Sinus bradycardia
News
Sinus bradycardia in the news Be alerted to news on Sinus bradycardia News trends on Sinus bradycardia
Commentary
Blogs on Sinus bradycardia
Definitions
Definitions of Sinus bradycardia
Patient Resources / Community
Patient resources on Sinus bradycardia Discussion groups on Sinus bradycardia Patient Handouts on Sinus bradycardia Directions to Hospitals Treating Sinus bradycardia Risk calculators and risk factors for Sinus bradycardia
Healthcare Provider Resources
Symptoms of Sinus bradycardia Causes & Risk Factors for Sinus bradycardia Diagnostic studies for Sinus bradycardia Treatment of Sinus bradycardia
Continuing Medical Education (CME)
CME Programs on Sinus bradycardia
International
Sinus bradycardia en Espanol Sinus bradycardia en Francais
Businness
Sinus bradycardia in the Marketplace Patents on Sinus bradycardia
Experimental / Informatics
List of terms related to Sinus bradycardia

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Sinus bradycardia is a heart rhythm that originates from the sinus node and has a rate of under 60bpm.

Etiology

• This rhythm may be caused by one of the following:
  • Increased vagal tone.
  • Intrinsic disease of the SA node.
  • An effect of drugs, such as the use of digitalis, beta-blockers, or quinidine.
  • Sleep
  • It could also be a normal finding in a healthy, well-conditioned person.

ECG Characteristics

• Rate: Less than 60.
• Rhythm: Regular.
• P waves: Upright, consistent, and normal in morphology and duration.
• PR Interval: Between 0.12-0.20 seconds in duration.
• QRS complex: Less than 0.12 seconds in width, and consistent in morphology.

Significance

The decreased heart rate can cause a decreased cardiac output resulting in symptoms such as lightheadedness, dizziness, hypotension, vertigo, and syncope. The slow heart rate may also lead to atrial, junctional, or ventricular ectopic rhythms.

Sinus bradycardia is not necessarily a bad symptom. People who regularly practice sports may have sinus bradycardia, because their trained hearts can pump enough blood in each contraction.

Differential Diagnosis of Causes of Sinus Bradycardia

In alphabetical order. ^{[1] [2]}

• Amyloidosis
• Brucellosis
• Catheterization of the heart
• Chronic hepatopathy
• Congenital Heart Disease
• Drugs
• Hypercalcemia
• Hypercapnia
• Hyperkalemia
• Hypersensitive carotid sinus
• Hyperthermia
• Hypothyroidism
• Hypoxia
• Increased intracranial pressure
• Meningitis
• Myocardial Infarction
• Perimyocarditis
• Physical training
• Physiologic at night
• Sepsis
• Sick Sinus Syndrome (SSS)
• Tumors
• Typhoid Fever
• Vagal nerve stimulation
• Vagotonia
• Vasovagal syncope
• Ventricular rhythm
• Wandering atrial pacemaker

References

See also

• Sinus tachycardia
• Long QT syndrome

Additional resources

• ECGpedia: Course for interpretation of ECG
• The whole ECG - A basic ECG primer
• 12-lead ECG library
• Simulation tool to demonstrate and study the relation between the electric activity of the heart and the ECG
• ECG information from Children's Hospital Heart Center, Seattle
• ECG Challenge from the ACC D2B Initiative
• National Heart, Lung, and Blood Institute, Diseases and Conditions Index
• A history of electrocardiography
• EKG Interpretations in infants and children

EKG Examples

v • d • e Electrocardiography
Overview	History of the EKG • EKG interpretation basics • Normal sinus rhythm
EKG Complexes	P wave • QRS complex • ST Segment • T wave • U wave Osborn wave • H wave • K wave • Delta wave NSSTW changes
EKG Intervals	PR Interval • QRS Interval • ST Interval • QT Interval
Conduction System & Bradycardia	Cardiac pacemaker • SA node • AV node• Bundle of His • Purkinje fibers • Sinus bradycardia • First Degree AV Block • Second Degree AV Block • Complete or Third-Degree AV Block • Concealed conduction • AV Junctional Rhythms • LBBB • LAHB • LPHB • RBBB • Trifascicular block
Atrial Arrhythmias	Sinus tachycardia • Premature Atrial Contractions (PACs) • Ectopic Atrial Rhythm • Paroxysmal Atrial Tachycardia (PAT) • Paroxysmal Atrial Tachycardia (PAT) with Block • Multifocal Atrial Tachycardia (MAT) • Atrial Flutter • Atrial Fibrillation • Wandering atrial pacemaker
Ventricular Arrhythmias	Differential Diagnosis of Tachycardia with a Wide QRS Complex • Accelerated Idioventricular Rhythm • Ventricular Parasystole • Premature Ventricular Contractions (PVCs) • Ventricular tachycardia • Ventricular Fibrillation • Sudden cardiac death
EKG Abnormalities in Disease States	Hypertrophy & Dilatation • Right atrial enlargement • Left atrial enlargement • Biatrial enlargement • Left Ventricular Hypertrophy • Right Ventricular Hypertrophy • Biventricular Hypertrophy • Acute myocardial infarction • NSTEMI • STEMI • Right ventricular myocardial infarction • Atrial infarction Pre-excitation Syndromes • Wolff-Parkinson-White Syndrome • Lown Ganong Levine Syndrome • Mahaim Type Preexcitation Cardiomyopathies • Arrhythmogenic Right Ventricular Dysplasia • Dilated Cardiomyopathy • Hypertrophic Cardiomyopathy Drug Effects on the EKG • Adenosine • β-blockers • Digitalis • Quinidine • Procainamide • Disopyramide • Lidocaine • Tocainide and Mexiletine • Phenytoin • Encainide, Flecainide and Propafenone • Amiodarone • Bretylium • Ca Channel Blockers • Phenothiazines • Tricyclic Antidepressants • Lithium Congenital Heart Disease • Dextrocardia • Atrial Septal Defect • Ventricular Septal Defect • Tetralogy of Fallot • Conjoined Twins or Siamese Twins Electrolyte Disturbances • Hyperkalemia • Hypokalemia • Hypercalcemia • Hypocalcemia • Nonspecific Changes Other Heart Diseases • Pericarditis • Myocarditis • Tamponade • Heart Transplantation • Sick Sinus Syndrome • Long QT Syndrome Inherited Disease • Brugada Syndrome Systemic Diseases • CNS Disease • Cardiac Tumors Heart Transplantation • EKG Changes in patient with Heart Transplantation Exogenous Effects • Hypothermia • Chest Trauma • Insect Bites • Electric Injuries
Technical Issues and Potential Errors in Interpretation	Artifacts • Lead Placement Errors • The EKG in a Patient with a Pacemaker

v • d • e WikiDoc Research Resources for Sinus bradycardia (Click show to right to view)
Articles on Sinus bradycardia	Most recent articles on Sinus bradycardia • Most cited articles on Sinus bradycardia • Review articles on Sinus bradycardia • Articles on Sinus bradycardia in N Eng J Med, Lancet, BMJ
Media (Slides, Video, Images, MP3) on Sinus bradycardia	Powerpoint slides on Sinus bradycardia • Images of Sinus bradycardia • Photos of Sinus bradycardia • Podcasts & MP3s on Sinus bradycardia • Videos on Sinus bradycardia
Evidence Based Medicine Regarding Sinus bradycardia	Cochrane Collaboration on Sinus bradycardia • Bandolier on Sinus bradycardia • TRIP on Sinus bradycardia
Cost Effectiveness of Sinus bradycardia	Cost Effectiveness of Sinus bradycardia
Clinical Trials Involving Sinus bradycardia	Ongoing Trials on Sinus bradycardia at Clinical Trials.gov • Trial results on Sinus bradycardia • Clinical Trials on Sinus bradycardia at Google
Guidelines / Policies / Government Resources (FDA/CDC) Regarding Sinus bradycardia	US National Guidelines Clearinghouse on Sinus bradycardia • NICE Guidance on Sinus bradycardia • NHS PRODIGY Guidance • FDA on Sinus bradycardia • CDC on Sinus bradycardia
Textbook Information on Sinus bradycardia	Books and Textbook Information on Sinus bradycardia
Pharmacology Resources on Sinus bradycardia	Dosing of Sinus bradycardia • Drug interactions with Sinus bradycardia • Side effects of Sinus bradycardia • Allergic reactions to Sinus bradycardia • Overdose information on Sinus bradycardia • Carcinogenicity information on Sinus bradycardia • Sinus bradycardia in pregnancy • Pharmacokinetics of Sinus bradycardia •
Genetics, Pharmacogenomics, and Proteinomics of Sinus bradycardia	Genetics of Sinus bradycardia • Pharmacogenomics of Sinus bradycardia • Proteomics of Sinus bradycardia
Newstories on Sinus bradycardia	Sinus bradycardia in the news • Be alerted to news on Sinus bradycardia • News trends on Sinus bradycardia
Commentary on Sinus bradycardia	Blogs on Sinus bradycardia
Patient Resources on Sinus bradycardia	Patient resources on Sinus bradycardia • Discussion groups on Sinus bradycardia • Patient Handouts on Sinus bradycardia • Directions to Hospitals Treating Sinus bradycardia • Risk calculators and risk factors for Sinus bradycardia
Healthcare Provider Resources on Sinus bradycardia	Symptoms of Sinus bradycardia • Causes & Risk Factors for Sinus bradycardia • Diagnostic studies for Sinus bradycardia • Treatment of Sinus bradycardia
Continuing Medical Education (CME) Programs on Sinus bradycardia	CME Programs on Sinus bradycardia
International Resources on Sinus bradycardia	Sinus bradycardia en Espanol • Sinus bradycardia en Francais
Business Resources on Sinus bradycardia	Sinus bradycardia in the Marketplace • Patents on Sinus bradycardia
Informatics Resources on Sinus bradycardia	List of terms related to Sinus bradycardia

sv:Sinusbradykardi

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .