Jump to navigation Jump to search
A cardiotocograph recording fetal heart rate and contractions

WikiDoc Resources for Cardiotocography


Most recent articles on Cardiotocography

Most cited articles on Cardiotocography

Review articles on Cardiotocography

Articles on Cardiotocography in N Eng J Med, Lancet, BMJ


Powerpoint slides on Cardiotocography

Images of Cardiotocography

Photos of Cardiotocography

Podcasts & MP3s on Cardiotocography

Videos on Cardiotocography

Evidence Based Medicine

Cochrane Collaboration on Cardiotocography

Bandolier on Cardiotocography

TRIP on Cardiotocography

Clinical Trials

Ongoing Trials on Cardiotocography at Clinical

Trial results on Cardiotocography

Clinical Trials on Cardiotocography at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Cardiotocography

NICE Guidance on Cardiotocography


FDA on Cardiotocography

CDC on Cardiotocography


Books on Cardiotocography


Cardiotocography in the news

Be alerted to news on Cardiotocography

News trends on Cardiotocography


Blogs on Cardiotocography


Definitions of Cardiotocography

Patient Resources / Community

Patient resources on Cardiotocography

Discussion groups on Cardiotocography

Patient Handouts on Cardiotocography

Directions to Hospitals Treating Cardiotocography

Risk calculators and risk factors for Cardiotocography

Healthcare Provider Resources

Symptoms of Cardiotocography

Causes & Risk Factors for Cardiotocography

Diagnostic studies for Cardiotocography

Treatment of Cardiotocography

Continuing Medical Education (CME)

CME Programs on Cardiotocography


Cardiotocography en Espanol

Cardiotocography en Francais


Cardiotocography in the Marketplace

Patents on Cardiotocography

Experimental / Informatics

List of terms related to Cardiotocography

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


In medicine (obstetrics) cardiotocography (CTG) is a technical means of recording (-graphy) the fetal heartbeat (cardio-) and the uterine contractions (-toco-) during childbirth. CTG can be used to identify signs of fetal distress.


Recordings are done by two separate transducers, one for the measurement of the fetal pulse and a second one for the contractions.

External measurement means taping or strapping the electrodes to the abdominal wall, with the heart electrode overlying the fetal heart and the contraction electrode measuring the tension of the abdominal wall, an indirect measure of the intrauterine pressure.

Internal measurement requires a certain degree of cervical dilatation, as it involves inserting a pressure catheter into the uterine cavity, as well as attaching a scalp electrode to the child's head to adequately measure the pulse. Internal measurement is more precise, and might be preferable when a complicated childbirth is expected.

A typical CTG reading is printed on paper or stored on a computer terminal for later reference.


CTG times the contractions and the variability in the fetal heart rate. Baseline abnormalities in the heart rate (brady- or tachycardia) may be interpreted in the context of the presentation, as may absence of variability in the FHR.

Decelerations (slowing of the fetal heart rate) during a uterine contraction is normal (type 1 deceleration, or type I dips), but further slowing after resolution of the contraction (type II dips) is generally regarded as pathological and may be taken as a sign of fetal distress.


Template:WH Template:WS