McLachlan, Craig S Increased total heart rate variability and enhanced cardiac vagal autonomic activity in healthy humans with sinus bradycardia. [electronic resource] - Proceedings (Baylor University. Medical Center) Oct 2010 - 368-70 p. digital Publication Type: Journal Article ISSN: 1525-3252 Standard No.: 10.1080/08998280.2010.11928655 doi