Final answer:
An ECG reflects the ventricular action potential with systole marked by the QRS complex and diastole by the T wave, encompassing the total duration of the action potential.
Step-by-step explanation:
The question you're asking relates to the duration of a ventricular action potential within the cardiac cycle, specifically within the electrocardiogram (ECG) readings that correspond to ventricular systole and ventricular diastole. The ventricular action potential is linked to the electrical activity that results in ventricular contraction (systole) and relaxation (diastole). In an ECG, ventricular systole is represented by the QRS complex, lasting approximately 270 ms, while ventricular diastole is noted by the T wave, with a duration of about 430 ms. Together, these phases account for the entirety of the ventricular action potential's duration. It is important to understand these intervals to diagnose and monitor cardiac health effectively.
The entire duration of a ventricular action potential is represented by the T wave. The T wave is a component of the electrocardiogram (ECG) that represents the repolarization of the ventricles. It lasts approximately 430 ms and indicates the period of ventricular relaxation or diastole.