Sinus arrhythmia is a normal variation in heart rate that occurs during breathing. Read on to learn the difference between normal and irregular sinus arrhythmia.

It's a type of arrhythmia, meaning the heart rhythm isn't happening in the normal way. Idioventricular rhythm may be seen ...

Below are three more examples of rhythms other than sinus rhythm: atrial fibrillation, atrial flutter and multifocal atrial tachycardia.

Results indicate that sinus arrhythmia is evident in preterm infants, and individual differences in this phenomenon may reflect the infant's health status and sleep state organization.

Ventricular tachycardia refers to a wide QRS complex heart rhythm — that is, a QRS duration beyond 120 milliseconds — originating in the ventricles at a rate of greater than 100 beats per ...

Normal ECGs include common, training-related findings in athletes such as high QRS amplitude meeting voltage criteria for left ventricular hypertrophy, early repolarisation, sinus bradycardia, sinus ...