Does the amplitude of QRS complex change with the pulse amplitudes? Why or why not?

So I think that the amplitude of the QRS complex should cause the pulse amplitude to change, because the pulse pressure is determined by the force of contraction of the heart.

Am i on the right track?

Yes, you are on the right track! The amplitude of the QRS complex on an electrocardiogram (ECG) represents the electrical activity associated with depolarization of the ventricles during a heartbeat. It is a measure of the amount of electrical activity generated by the heart's contraction.

However, it is important to note that the amplitude of the QRS complex on an ECG does not directly correspond to the pulse amplitude, which is determined by the pressure generated by the heart's contraction. The pulse amplitude measures the strength or intensity of the pulse felt at a peripheral artery, typically in the wrist (radial artery).

The pulse amplitude is influenced by various factors such as the stroke volume (the amount of blood ejected by the heart with each beat) and peripheral resistance (the resistance encountered by the blood flow in the peripheral arteries). The QRS complex, on the other hand, represents the electrical activity of the heart and does not directly reflect the blood pressure or pulse amplitude.

While there may be some correlation between the electrical activity of the heart and the pulse amplitude, it is not a direct relationship. Factors like arterial stiffness, vascular tone, and peripheral resistance also affect the pulse amplitude.

To assess the pulse amplitude accurately, it is necessary to measure it directly using a blood pressure cuff or a pulse oximeter, rather than relying on the amplitude of the QRS complex on an ECG.

Sure.