20 Multiple Choice 2 points The Q-T interval corresponds to which event(s)? Atrial depolarization and repolarization Ventricular depolarization and repolarization Ventricular repolarization only Ventricular depolarization only ing 2 hours Search
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Texts: 20 Multiple Choice 2 points The Q-T interval corresponds to which event(s)? Atrial depolarization and repolarization Ventricular depolarization and repolarization Ventricular repolarization only Ventricular depolarization only ing 2 hours Q Search Show more…
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Adi S.
22) Which of the following represents the accurate sequence of the spread of cardiac excitation? (2 pts) a) Right atrium – right ventricle – left atrium – left ventricle b) Right ventricle – left atrium – left ventricle – right atrium c) SA node – AV node – bundle of His – Purkinje fibers d) SA node – bundle of His – AV node – Purkinje fibers 23) During the P-Q interval, which of the following mechanical events is/are occurring? Choose ALL that apply. (2.5 points) a) Atria contract. b) AV valves close creating the S1 heart sound. c) Blood volume in the ventricles increases. d) Pressure in the atria increases. e) Ventricles depolarize. 24) Match the ECG components to the appropriate description. (4 points) Matching options: • P wave • PQ interval • QRS complex • ST segment • T wave • TP interval a) Which ECG component corresponds to atrial depolarization? b) Which ECG component corresponds to ventricular depolarization? c) Which ECG component represents the time from the beginning of atrial excitation to the beginning of ventricular excitation? d) Which ECG component represents the time when the contractile muscle fibers of the ventricles are completely depolarized? e) What ECG wave comes immediately before ventricular systole? f) If heart rate increased, which ECG component would change the most? g) Which ECG wave comes immediately before atrial contraction? h) Which ECG wave comes immediately before ventricular relaxation?
Madhur L.
Examine the diagrammatic representation of standard ECG. Select an option with correct matching. $\begin{array}{lll}\text { P-Wave } & \text { QRS complex } & \text { T-wave }\end{array}$ $\begin{array}{lll}\text { (a) Repolarisation } & \begin{array}{l}\text { Repolarisation }^{\circ} \\ \text { of the atria }\end{array} & \begin{array}{l}\text { Depolarisation } \\ \text { of the ventricles }\end{array} & \text { of the atria }\end{array}$ (b) Depolarisation Depolarisation Repolarisation of the atria of the ventricles of the ventricles (c) Repolarisation Repolarisation Depolarisation of the ventricles of the atria of the ventricles (d) Depolarisation Depolarisation Repolarisation of the ventricles of the atria 3 of the atria
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