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The volume of blood the heart pumps each minute.
CO = HR × SV.
The Cardiac Cycle
The sequence of mechanical and electrical events in one heartbeat (systole + diastole).
Fetal Circulation
How the fetus routes blood around its non-functioning lungs and liver.
ECG Basics
The surface recording of the heart's electrical activity.
Starling Forces & Capillary Exchange
The balance of hydrostatic and oncotic pressures governing fluid movement across capillaries.
Coronary Circulation
The blood supply to the heart muscle itself, and the special feature that most of it flows during diastole.
Properties of Cardiac Muscle
The special features of heart muscle that let it beat on its own, in a coordinated way, without tiring, throughout life.