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Cardiac Physiology Part 1: SA Node to PR Interval – How the Heart’s Electrical Command Begins
In advanced cardiovascular physiology, the electrocardiogram (ECG) and mechanical hemodynamics are frequently treated as separate clinical domains. This separation creates diagnostic blind spots. The cardiac cycle is not a sequence of isolated electrical waveforms followed by passive mechanical events; it is a continuous, tightly coupled process of electromechanical translation. To master acute care hemodynamics and…