Question

1. Compare the supine ECG values to the post-exercise values. Which intervals and/or segments changed most significantly? Include a detailed discussion of specific changes (include numerical values) to support your findings and analysis. Discuss your group’s heart rate data and use your knowledge of physiology to explain how and why these changes were seen. Address your hypothesis and explain the overall significance of the changes seen in cardiac cycle.

Activity	P-R	Q-T	QRS complex	T-P	Heart rate
Supine (resting)	0.0770	0.350	0.075	0.386	81
Exercise	0.116	0.305	0.330	0.376	160

Answer 1

HUDP Changes in Ecg After exercise : * PR interval changes : The changes of PR interval during exercise Suggest that implanted Cardiac pacemaker aborithme may be construited to maximize hemodynamic benefits requiring physiological pacemakers + P-wave height) amplitude and morphology undergo minor changel Rwave height increase from rest to Submaximut. QT integral change i -7 QT interval Shortening during exercise. Contribution of heart rate to QT interval Causes Shortening during exercise. QT interval experiences a gate related Shortening during exerefte * * QRS complex ; → Decreated amplitude of the QR complex and electrical alternans are electrocardiographic findings toadionally assosiated with pericardial effusions Decreased QRs amplitude is due to theid dampening and short circuiting the electrical Signal

Top Segment : + TP segment is the isoelectrical interval on the electrocardiogram (ECE). it is the region between the end of the T Wave and the next P Wave . It represents the time when the heart muscle cells are electrically Silent. * T-p segment time decreases. rate : Heart + The heart beat faster during exercise caused by increasing the heart rate. The body is able to increase Cardiae output and deliver the necessary blood flow to the muscles.