The Phase of the Cardiac Cycle

33.15 Pressure in the punk is the lowest at ventricular diastole.

33.16 The insistency deflection cognize as the dicrotic nonch is a notch on the rising limb of a quiver tracing caused by having wiz heartbeat for two arterial pulsations (Thomas, 1073, D36).

d 0.3 seconds (Applegate, 2000, 251)

33.18 0.75 seconds. The diastolic dispense of the cardiac cycle is decreased if the heart order increases (251).

33.19 The elbow grease of blood through the heart is promoted by sinoatrial node, which causes the atria to contract together and establishes the rhythm of the heartbeat, and the auriculoventricular node, which coordinates the contraction of the ventricles (246-247).

33.21a over the right atrioventricular junction at the tail musculus intercostalis space

b at the base of the ascending aorta at the level of the third intercostal space

c apex of the heart at the level of the fourth costal cartilage

33.22 Abnormal heart sounds are used to study problems with the heart valves e.g. not closing properly (252).

33.23 The pulse is the Adonic expansion and recoil of the walls of an artery felt in resolution to the surge of blood through the arteries with ventricular contraction (266)

33.24 The pulse is usually taken by placing the fingers over the radial artery in the wrist and counting the beats per minute (Detroit, 2000). The turn over m

Detroit Medical Center. (2000). Heart rate :how to count. Retrieved at:

33.30 Blood pressure refers to the pressure of blood in the aorta and arteries.

It is greatest during ventricular contraction and lowest during ventricular heartsease (267).

33.36 Pulse pressure is the difference between the systolic pressure and the diastolic pressure. This measure is important because it gives an indication of the presence of arteriosclerosis.

apical pulse - arterial pulse = pulse deficit (Vital, 2004).

33.26 The carotid artery appeared to have the greatest amplitude. This was probably because it is a study artery and is very close to the heart, so the pressure has not had a chance to dissipate yet.

33.38 During inspiration, the diaphragm contracts and puts pressure on the abdomen to lower the pressure in the thorax. This causes blood in the abdominal veins to move from an area of higher pressure in the abdomen to one of lower pressure in the thorax. Valves in the veins prevent the backflow of blood.

b Diastolic pressure occurs during ventricular relaxation.

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