Sinus arrhythmia is the variation in heart rate attributable to respiration. Fox and Forges (1985) have found that the “amplitude” of sinus arrhythmia measured near birth is correlated with ...

Electrocardiologists are cardiologists who have received additional training in testing for and treating heart rhythm problems. Electrocardiologists are also known as electrophysiologists, cardiac ...

A randomized trial that compared previously used and new pacemakers in patients found the reconditioned devices were as safe and effective as new pacemakers, potentially offering affordable options ...