The cyclic changes occur in the heart during heart beat Cardiac cycle duration = 60/HR = 60/75 = 0.8 sec ↑↑ HR→↓↓cardiac cycle duration

Audio Recording Nov 11, 2020 at 9:00:55 PM. Cardiac cycle.

Audio Recording Nov 11, 2020 at 10:18:29 PM. c.cycle2.bmp.

Audio Recording Nov 11, 2020 at 11:46:03 PM. Heart sounds.

Audio Recording Nov 11, 2020 at 11:55:54 PM. HEART RATE.

Audio Recording Nov 11, 2020 at 11:58:02 PM. Heart rate is increased by: 1- Decreased ABP. 2- Inspiration. 3- Emotions. 4- Exercise. 5- Thyroid hormones. 6- Adrenaline (epinephrine) 7- Hypoxia. 8- Fever. Heart rate is decreased by: 1- Increased ABP. 2- Expiration. 3- Sleep..

Audio Recording Nov 11, 2020 at 11:59:41 PM. Cardiac output.

Audio Recording Nov 12, 2020 at 12:08:24 AM. Factors affecting Cardiac output.

Audio Recording Nov 12, 2020 at 12:09:46 AM. Regulation of Cardiac output.

Audio Recording Nov 12, 2020 at 12:19:30 AM. Factors affecting VR: Tissue metabolism thoracic pump muscle pump arteriolar diameter capillary tone venomotor tone gravity contraction of blood reservoir.