Pulse of Physiology

Dive intopressure-volume loops, which illustrate ventricular function. This episode explainsventricular filling, isovolumic contraction, ejection, and isovolumic relaxation, along with the effects ofp...

28 Feb 20255min

Learn howheart rate and stroke volume determine cardiac output (Qc = HR × SV). This episode explainscardiac reserve, ejection fraction, and the factors that regulate Qc, emphasizing how the heart adju...

28 Feb 20254min

Understand themechanical and pressure changes that occur in each heartbeat. This episode coverssystolic and diastolic blood pressure, aortic pressure dynamics, and the differences between right and le...

26 Feb 20254min

Explore theWiggers Diagram, a comprehensive visual of the cardiac cycle. This episode connectsventricular pressure, volume changes, ECG activity, and heart sounds, showing how these factors interact d...

24 Feb 20256min

Stroke volume—the amount of blood ejected per beat—is influenced by preload, contractility, and afterload. This episode covers the Frank-Starling Law, inotropic effects, and how afterload affects card...

21 Feb 20255min

Cardiac muscle differs from skeletal muscle due to its autorhythmicity, intercalated discs, and plateau phase. This episode explores calcium’s role in contraction, action potential phases, and why the...

21 Feb 20255min

The EKG provides a graphical representation of heart activity. This episode breaks down the P-wave, QRS complex, T-wave, and intervals, helping you understand how electrical signals correlate with hea...

21 Feb 20254min

Trace the electrical pathway of the heart, from the SA node to the Purkinje fibers. Learn how gap junctions coordinate contraction, how AV node delay optimizes filling time, and how backup pacemakers ...

19 Feb 20254min