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The spread of an electrical impulse is therefore directly coupled to a mechanical. It describes the cardiac cycle, including the electrical and. Depolarization activates the myocardial cells and induces cellular processes that lead to cell contraction.
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Cardiac contraction is initiated in the excitable cells of the sinoatrial (sa) node by both spontaneous depolarization and sympathetic activity. Depolarization spreads from sa node across. The document discusses the electrocardiogram (ecg or ekg), which records the electrical activity of the heart.
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Electrical events of the cardiac cycle sinoatrial (sa) node is the normal pacemaker of heart and is located in right atrium.
Each component, segment, and interval is labeled and corresponds to important electrical events, demonstrating the relationship between these events and contraction in the heart. Each component, segment, and interval is labeled and corresponds to important electrical events, demonstrating the relationship between these events and contraction in the heart. Electrical events of the cardiac cycle, ecg and electrical activity of the heart. Each segment of an ecg tracing corresponds to one event in the cardiac cycle.
The cardiac cycle refers to a complete heartbeat from its generation to the beginning of the next. This diagram correlates an ecg tracing with the electrical and mechanical events of a heart contraction. Thus, changes in electrical membrane potential of specific parts of the heart tissue represent. The sinoatrial (sa) and atrioventricular.
Each segment of an ecg tracing corresponds to one event in the cardiac cycle.
Electrical changes in heart tissue cause mechanical changes, i.e. This diagram correlates an ecg tracing with the electrical and mechanical events of a heart contraction.
