why the cardiac impulse does not generate if SA node becomes defective?
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the connective tissue of heart is formed of
SA node- intermittent fibers - AV node - Bundle of Hiss - Purkinje fibers. if SA node fails There will be cardiac pulse by AV node at a rate of 50-60beats /minutes. If that fails BOH at 40beats /minutes and lastly Purkinje fibers at 30beats /min
SA node- intermittent fibers - AV node - Bundle of Hiss - Purkinje fibers. if SA node fails There will be cardiac pulse by AV node at a rate of 50-60beats /minutes. If that fails BOH at 40beats /minutes and lastly Purkinje fibers at 30beats /min
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