Related Experiment Video
Updated: Aug 4, 2026

Impact of Intracardiac Neurons on Cardiac Electrophysiology and Arrhythmogenesis in an Ex Vivo Langendorff System
Published on: May 22, 2018
[Intraesophageal electrocardiography: an old technic under a new concept]
M A Seminario Origgi1, R A Godoy
1Departamento de Clínica Médica, Facultad de Medicina de Ribeirão Preto, Universidad de São Paulo, Brasil.
Abstract:
Transesophageal recording of heart potentials is a fully accepted procedure for the electrical study of the heart. However, the intraesophageal ECG could be explored even better by using multipolar catheter electrodes and by considering various characteristics of the tracing such as amplitude, frequency and velocity. The authors describe their experience with the use of these electrodes and recording characteristics applied to the field of investigation and diagnosis of the electrical activity of supraventricular region. This objective can also by achieved by constructing esophagus-thoracic wall bipolar derivations.
Related Concept Videos
Electrocardiogram
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and the T...
Correlation between ECG and Cardiac Cycle
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
Electrocardiogram Fundamentals
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin to...
Imaging Studies for Cardiovascular System I:Echocardiography
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...
Imaging Studies for Cardiovascular System II:Types of Echocardiography
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
Holter Monitor: 24-Hour Monitoring

