The action potential is conducted to the...

The action potential is conducted to the ventricles by AVN (Atrioventricular node) damage to AVN results in

Tachycardia

Heart block / Ventricular escape

Atherosclerosis

Congestive heart failure

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Read the following statements : A. The action potential generated by the SA node stimulates both ventricles to undergo simultaneous contraction. B. The heart sound Lubb is associated with the closure of both semilunar valves. C. The QRS complex in ECG represents the depolarization of the ventricles. Select the appropriate option from the following :

Another mass of nodal tissue called atrio-ventricular node (AVN) is present in

Identify the correct sequence of the cardiac cycle. (i) Blood through the pulmonary vein and vena cava enters in left and right atria respectively. (ii) AVN generates action potential for the ventricles. (iii) SAN bring about atrial systole . (iv) Ventricular systole pushes blood away from the heart .

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Which of the following events do not occur during joint diastole ? I. All 4 chambers of heart are in relaxed state II. Tricuspid and bicuspid valves open III. Action potential is conducted from SAN to AVN IV. Blood from the pulmonary veins and venae cavae flows into the left and right ventricles respectively through the left and right atria V. The semilunar valves are closed

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