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Home / Physiology / Cardiovascular Physiology

Cardiovascular Physiology

3 topics in Cardiovascular Physiology for PGET Paper I Physiology. Each one explains the concept simply, then gives exam-focus points and a quick revision list.

Properties of cardiac tissue and the conduction pathwayThe four properties of heart muscle (automaticity, excitability, conductivity and contractility), the route of the cardiac impulse from SA node to Purkinje fibres with its speeds and delays, and how the autonomic nerves change heart rate and conduction.Cardiac action potentialsThe five phases of the ventricular muscle action potential and the channels behind each, the pacemaker action potential of the SA node and how it differs, refractory periods, and how autonomic nerves and drugs change them.The ECG and cardiac axisWhat each wave and interval of the normal ECG represents, how they match the phases of the cardiac action potential, the 12 leads, and how to work out the cardiac axis and its deviation.
Previous chapterExcitable TissueNext chapterRespiratory Physiology

All Physiology chapters · All PGET subjects

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For education and revision. Not a medical device and not a substitute for clinical judgement, senior advice or your hospital’s protocols. Check every dose against a current drug reference before prescribing. Not affiliated with PMDC, CPSP, NUMS or any hospital.