Which component of the ECG represents the end of ventricular depolarization?

Which component of the ECG represents the end of ventricular depolarization?

• A. P wave
• B. QRS complex
• C. ST segment
• D. T wave

Answer: (C)

The ST segment represents the end of ventricular depolarization. During the ECG cycle, ventricular depolarization occurs during the QRS complex, and it culminates as the myocardium transitions from depolarized to repolarized states. The ST segment marks the period between the end of the QRS complex and the start of the T wave, indicating that the ventricular muscle is in a plateau phase where the cells are in a state of almost complete depolarization. This segment is crucial for assessing the heart's electrical stability and can provide vital information regarding conditions like ischemia or myocardial infarction. The other components, such as the P wave and QRS complex, represent different phases of the cardiac cycle: atrial depolarization and ventricular depolarization, respectively. The T wave represents ventricular repolarization, occurring after the ST segment. Understanding these phases is essential for interpreting ECG readings accurately in telemetry settings.

The ST segment represents the end of ventricular depolarization. During the ECG cycle, ventricular depolarization occurs during the QRS complex, and it culminates as the myocardium transitions from depolarized to repolarized states. The ST segment marks the period between the end of the QRS complex and the start of the T wave, indicating that the ventricular muscle is in a plateau phase where the cells are in a state of almost complete depolarization. This segment is crucial for assessing the heart's electrical stability and can provide vital information regarding conditions like ischemia or myocardial infarction. The other components, such as the P wave and QRS complex, represent different phases of the cardiac cycle: atrial depolarization and ventricular depolarization, respectively. The T wave represents ventricular repolarization, occurring after the ST segment. Understanding these phases is essential for interpreting ECG readings accurately in telemetry settings.