alleryStart learning →Roughly how long does ventricular systole last in total?
A100 ms
B270 ms
C430 ms
D800 ms
Answer & Solution
Correct answer: B. 270 ms
1. Ventricular systole follows ventricular depolarisation, shown by the QRS complex.
2. It divides into two phases lasting a total of 270 ms.
3. Atrial systole runs about 100 ms and ventricular diastole about 430 ms, the two distractors here.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.3 | Cardiac Cycle_
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