Which ECG complex represents ventricle contraction?

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Prepare for the PLTW Biomedical Science Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for your exam!

Multiple Choice

Which ECG complex represents ventricle contraction?

Explanation:
Ventricular contraction is triggered by ventricular depolarization, which appears as the QRS complex on the ECG. This rapid spike shows the electrical impulse spreading through the ventricles, prompting them to contract (systole). The P wave above it reflects atrial depolarization and atrial contraction. The T wave after represents ventricular repolarization, meaning the ventricles are relaxing. The PR interval is the time from the start of atrial depolarization to the start of ventricular depolarization and includes the AV node delay, not a contraction by itself.

Ventricular contraction is triggered by ventricular depolarization, which appears as the QRS complex on the ECG. This rapid spike shows the electrical impulse spreading through the ventricles, prompting them to contract (systole). The P wave above it reflects atrial depolarization and atrial contraction. The T wave after represents ventricular repolarization, meaning the ventricles are relaxing. The PR interval is the time from the start of atrial depolarization to the start of ventricular depolarization and includes the AV node delay, not a contraction by itself.

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