Which one of the following is wrong? The T wave is produced by repolarization of the atrium The P wave is produced by depolarization of the atria The first heart sound occurs when the QRS complex is produced The QRS complex is produced by depolarization of the ventricles. The second heart sound occurs when the T wave is produced
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Step 1: The T wave is produced by repolarization of the ventricles, not the atrium. Show more…
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Find out the incorrect statement from the following: (a) ECG is a graphical representation of the electrical activity of the heart during cardiac cycle. (b) For a detailed evaluation of the heart's function, multiple leads are attached to the chest region (chest leads). (c) $\mathrm{P}, \mathrm{R}, \mathrm{T}$ are $+$ ve wave whereas $\mathrm{Q}$ and $\mathrm{S}$ are -ve wave in standard $\mathrm{ECG}$. (d) Starting of T-wave marks the end of systole of ventricles.
Which statement concerning events that occur in the heart is correct? The wave of excitation passes through the atrioventricular node with a time delay. Before it passes down the Purkinje tissue to the ventricles, movement of blood into the ventricles following atrial contraction causes the ventricular blood pressure to rise above the blood pressure in the atria, closing the atrioventricular valve. The conducting tissue between the atria and ventricles causes the wave of non-excitation to pass through the Purkinje tissue to reach the atrioventricular node. The sinoatrial node in the left atrium sends out a wave of excitation that spreads across the walls of the atria, resulting in the movement of blood from the atria into the ventricles.
Adi S.
The repolarization of the ventricles corresponds to which of the following on an ECG? a. The P wave b. The QRS wave c. The T wave d. It is masked by the QRS wave, so it isn't visible on the ECG.
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