7 As a result of the Myocardial infarction and death of the effected cardiac mus

Question

7 As a result of the Myocardial infarction and death of the effected cardiac muscle,

7a What happens to the stroke volume of the ventricle and why? ( 1 point)

7b As a result of the change in stroke volume, what happens to the cardiac output and total peripheral resistance (R) ( 1 point)

7c Why is giving a Beta blocker advantageous in Myocardial infarction ( 1 point)

8 Because, Mr. Jones, was not compliant with his medication and life style changes, he ended up in heart failure.

8a Which side of the heart has failed in MR. Jones? ( 1point)

8b Name a signs and symptoms of left sided heart failure ( 1 point)

8c Explain in detail the mechanism of development of pulmonary edema in this patient. How do diuretics help in his treatment? ( 3 points)

9a If the person is refractory to the heart failure medications, he can go into shock. What is the type of shock that you can expect in this person. What are some of the signs and symptoms of Shock? ( 1 point)

9b Explain in detail the short term and Long term compensatory mechanisms that come into play as a result of the condition in question 9a.( 2 points)

Explanation / Answer

7a) In myocardial infarction, the stroke volume is reduced due to the death of myocardial cells (necrosis), which result in impaired in the ventricular myocardial contacting. Stroke volume is the amount of blood ejected from the ventricle during each beat(cardiac cycle).

7b) Cardiac output is the amount of blood ejected from the ventricle per minute. The cardiac output is the product of the heart rate and stroke volume. Total peripheral resistance is the resistance offered on the path of blood circulation. As a result of reduced stroke volume, the cardiac cycle and peripheral resistance automatically reduced.

7c) Beta blockers decreased the oxygen demand due to reduction in heart rate, blood pressure, contractility, and consequently reduction of ischemic chest pain.

8a) Left side heart failure commonly occurs.

8b) and the signs and symptoms includes dysnea, tachypnea, increased body fluids, crackles/rales at bases, diaphorosis, weight gain, fatigue, extra heart sound, mental status changes, and capillary refill >3 second.

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