Presently available noninvasive rhythm recording options include the ECG, the Holter monitor ... hardware add-on that can record rhythm strips live, as well as handheld heart rhythm recording ...

High vagal tone in athletes results in bradycardia and repolarization anomalies on the resting ECG ... rhythm and conduction alterations, increased voltages and repolarization anomalies. Sinus ...

Careful evaluation for the cause of cardiac arrest including coronary angiography, cardiac MRI, signal averaged ECG, and provocative exercise and pharmacological challenge is necessary to exclude ...

A principal obstacle to such interpretation is the difficulty in distinguishing abnormal patterns from physiological effects of training. Many clinical and ECG findings that may be a cause of concern ...