Which of the following is the best description of systole and diastole?

Which of the following is the best description of systole and diastole?

Diastole and systole are two phases of the cardiac cycle. They occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body. Systole occurs when the heart contracts to pump blood out, and diastole occurs when the heart relaxes after contraction.

Which of the following best indicates why the left ventricular myocardium is thicker than the right ventricular myocardium?

Which of the following best indicates why the left ventricular myocardium is thicker than the right ventricular myocardium? The left ventricular works harder than the right ventricular. Which cavity first receives unoxygenated blood from the vena cava? Which of the following refers to a positive inotropic effect?

What happens to the pressure of the blood in the ventricle when the ventricle myocardium contracts?

What happens to the pressure of the blood in the ventricle when the ventricle myocardium contracts. The pressure increases. What is the effect of the ventricle contraction ( and the increase in the pressure of the blood in the ventricles) on the atrioventricular (AV) valves? The AV valves close.

Under what condition is blood most likely to flow backward eg from the left ventricle back into the left atrium )?

Sometimes mitral valve prolapse causes blood to leak back into the atrium from the ventricle, which is called mitral valve regurgitation. In this condition, the flaps (leaflets) of the mitral valve don’t close tightly, causing blood to leak backward into the left atrium of your heart.

Which wave is the largest in the electrocardiogram?

the R wave reflects depolarization of the main mass of the ventricles –hence it is the largest wave.

What is the hardest working cardiac chamber and therefore has the thickest myocardium?

The hardest working cardiac chamber with the thickest myocardium is the D) left ventricle. The right atrium receives all the oxygen poor blood from…

Is the myocardium thicker in the atrium or ventricle Why?

The ventricles of the heart have thicker muscular walls than the atria. This is because blood is pumped out of the heart at greater pressure from these chambers compared to the atria. This is due to the higher forces needed to pump blood through the systemic circuit (around the body) compared to the pulmonary circuit.

What happens during diastole quizlet?

What happens during diastole? The atria and ventricles are both relaxed. The internal volume increases and the blood flows into the atria, then through open atrioventricular valves into ventricles.

Under what condition is blood most likely to flow backward?

In aortic valve disease, the valve between the lower left heart chamber (left ventricle) and the body’s main artery (aorta) doesn’t work properly. The valve may be thickened and stiff (stenosis) or it may not close properly, causing blood to flow backward.

How is the myocardium twisted during a systole?

During systole, the myocardium is being twisted and compressed to eject blood out of the ventricle. When we use the word ‘twisted’ in reference to the LV during systole, think of a mop.

Why is the myocardium thicker in the left ventricle?

This is because it has to pump the blood further around the body, and against higher pressure, compared with the right ventricle. What is the thickest part of the myocardium? The myocardium is thickest in the left ventricle, as this chamber must create substantial pressure to pump blood into the aorta and throughout systemic circulation.

How is the amount of filling during diastole determined?

For example, if the patients heart rate is high, diastole will be shortened which gives the heart even less time to relax. The amount of filling during diastole is determined by the compliance (elasticity) of the ventricle and the pressure gradients during diastole.

Which is the thickest Chamber of the myocardium?

The myocardium is thickest in the left ventricle, as this chamber must create substantial pressure to pump blood into the aorta and throughout systemic circulation. How the thickness of the four chambers of the myocardium vary according to their function?