What event follows the QRS complex in terms of ventricular pressure changes?
Understand the Problem
The question is asking about the physiological changes that occur in the ventricles of the heart after the QRS complex, which is a part of the heart's electrical cycle. Specifically, it wants to know how the pressure within the ventricles changes in relation to the sequence of events following the QRS complex, which correlates with the depolarization of the ventricles and subsequent contraction.
Answer
Ventricular contraction follows the QRS complex, increasing ventricular pressure.
The event that follows the QRS complex in terms of ventricular pressure changes is ventricular contraction, leading to an increase in ventricular pressure.
Answer for screen readers
The event that follows the QRS complex in terms of ventricular pressure changes is ventricular contraction, leading to an increase in ventricular pressure.
More Information
The QRS complex on an ECG represents ventricular depolarization, which triggers the ventricles to contract. This contraction causes an increase in pressure within the ventricles, known as the isovolumetric contraction phase, marking the beginning of systole.
Tips
A common mistake is confusing depolarization with contraction. Remember, depolarization (QRS complex) triggers contraction, leading to pressure increase.
Sources
- Cardiac Cycle | Anatomy and Physiology II - courses.lumenlearning.com
- What does QRS complex represent in ECG? - BYJU'S - byjus.com
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