This ectopic focus becomes the predominant pacemaker of the heart. When the atrial rate is greater than 100 beats per minute, the rhythm is atrial tachycardia. If less than 100 beats per minute ...

The second ECG strip below shows an ectopic atrial rhythm. Note that the P wave is down in lead II and only up (not biphasic) in lead V1. If there is sinus rhythm, and the heart rate is less than ...

Sinus rhythm resumes with increased heart rates during exercise. In an ectopic atrial rhythm, P waves are present but are a different morphology compared to the sinus P wave. Ectopic P waves are most ...

and junctional ectopic tachycardia. [15] Supraventricular arrhythmias may occur in the pre- and post-MI setting. Causes of SVT include: irritation of atrial myocardium as a result of pericarditis ...

higher automaticity – ectopic beats; and re-entry – atrial tachyarrhythmia; and higher vulnerability to arrhythmia – heart rate and its variability. Most of these predictors are not ready ...

Stretch could affect trans-sarcolemmal Na+/Ca++ exchange, triggering ectopic excitation and inducing atrial and ventricular arrhythmias.3 Acute modulating factors such as haemodynamic stress, ...