cardiac physiology Q1

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Questions and Answers

whats the blood pressure in the pulmonary circuit?

28/8 mmHg.

what is the blood pressure in systemic circuit?

120/80 mmHg.

the heart failure results from?

the inability of the left ventricle to fill or eject blood, fill-diastolic performance, eject-systolic performance.

what's the cardiac cycle?

coordinated sequence of electrical and mechanical events occurring from the start of one heartbeat to the start of the next. Signup and view all the answers

what cause pressure changes in heart?

the conductive electrochemical changes within the myocardium that result in contraction of cardiac muscle. Signup and view all the answers

list the sequence in depolarisation in cardiac tissue.

1- artia depolrization. 2- depolarise septum from left to right. 3- depolarise anterioseptal region of myocardium toward the apex. 4- depolarise bulk of ventricle myocardium from endocardium to epicardium. 5- depolarize posterior portion of base of left ventricle. 6- ventricular depolarisation. Signup and view all the answers

that dos p wave represents?

atrial depolarisation. Signup and view all the answers

what does QRS complex represent?

ventricle depolarisation. Signup and view all the answers

what does T wave represent?

ventricular repolorization. Signup and view all the answers

list the phases of cardiac cycle.

1- atrial contraction. 2- ventricular isovolumetric contraction (both valves r closed).(av closed) 3- rapid ventricular ejection (semi-lunar valves r open, av closed) 4- slow ventricular ejection (semi-lunar closed, atria filling. 5- ventricular isovolumetric relaxation , both valves r closed. (semi-lunar closed). 6- ventricular filling (mitral opens). 7- diastole. Signup and view all the answers

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