When does isovolumetric relaxation occur?   A immediately after atrial contraction   B at the end of diastole   C immediately after the QRS wave on the ECG   D immediately after ventricular contraction   E ALL OF THE ABOVE

What is occurring in the heart when diastolic pressure is being measured 1. The heart Astoria are relaxing 2. the coronary artery is rekaxing 3. the heart ventricles are relaxing 4. the pulmonary vein is contracting

During atrial fibrillation: A. The EKG shows an exaggerated P wave. B. There is a noticeable increase in the regularity of beating. OC. The ventricle undergoes reentrant refractoriness. OD. None of the above. OE. All of the above.

The pco2 in the aorta is  a 40mmhg b 46mmHg c 100 mmHg

This abnormal ECG indicates: A ventricular fibrillation B premature ventricular contractions (PVCs) C ST-segment elevation D premature atrial contractions (PACS) hahah

I don’t understand this page in my lab book

The period of ejection: A. begins with closure of the AV-valves and ends with opening of the AV- valves B. begins with opening of the aortic valve and ends with closure of the aortic valve C. begins with the P-wave and ends with the QRS-complex D. begins with the QRS-complex and ends with the T-wave

All of the following are correct about the isovolumetric contraction, except  ____________.         A. This phase of the cardiac cycle begins with the appearance of the QRS complex of the ECG, which represents atrial repolarization and ventricular depolarization   B. It represents the time period between the closure of the AV valves and the opening of the aortic and pulmonic valves, ventricular pressure rises rapidly without a change in ventricular volume   C. The rate of pressure increase in the ventricles is determined by the rate of contraction of the muscle fibers, which is determine by mechanisms governing excitation-contraction coupling   D. Ventricular chamber geometry changes considerably as the heart becomes more spheroid in shape; circumference increases and atrial base-to-apex length increases

during isometric ventricular contraction: a. the entry and exit valves of the ventricle are closedb. pressure in the aorta arisesc. pressure in the atria fallsd. the rate of rise in pressure is greater in the right than in the left ventriclee. volume of the ventricle increases

The atrioventricular valve on the same side of the heart as the origin of the aorta is the _____ valve.   A aortic semilunar   B tricuspid   C bicuspid   D pulmoary semilunar