Mr. Jones a 58 year old sales executive has arrived in Washington DC night with

Question

Mr. Jones a 58 year old sales executive has arrived in Washington DC night with go out up in the middle of the that he had ache the center of his chest. He from the heavy arm. He in and left on the worse now radiating to the shoulder jaw into Jones left remembers is experiencing could be of a that Mr. (heart attacking on TV, that what he arrives, the EMT notices Mr. He immediately calls once, the Jones, Aspirin, as sweating profusely and he is the Rives done mask and starts IV no pale. ether can be given via the IV An EKG is Jones brought to the Hospital, the nurse takes the vital signs and brief Blood results shows suggesting a MI. Blood is drawn to look for enzymes. a cardiac MI are and show elevated and creative, confirming that Mr. Jones is controlled a past history is significant for poorly controlled essential hypertension, poorly medical His family history is on the Diabetes melees, poorly controlled drinks beer current smoker, has smoked 2 packs of cigarettes for the last 25 years and weekends.

Explanation / Answer

1) If there is embolus in the left anterior interventricular artery which part of heart is affected?

Left anterior interventricular artery is also reffered to as LAD (left anterior descending artery) which is the part of left coronary artery. From the pulmonary trunk, LAd originates at the left margin located anterior to the left atrial auricle. It descends on the sternocostal region of the heart within the anterior interventricular groove. the main function of he anterior interventricular artery is to supply the following regions:

If there was an embolus in the angiogram these mentioned areas above would have been affected. It provides the major blood supply to the interventricular septum, and thus bundle branches of the conducting system. Hence, in coronary artery disease blockage in LAD can lead to impairment or death (infarction) of the conducting system. The result is a "block" of impulse conduction between the atria and the ventricles known as "right/left bundle branch block."

2)Which part of EKG will be changed if ventricle is affected?

If there is damage to the Ventricle ST elevation is caused. This usually follows a large anterior infarct and, if the ST segment fails to return to the baseline, an echocardiogram is required to exclude flase results.

Along with this, QRS complex is also affected.

3)What happens to the stroke volume of ventricle during MI? Why?

Stroke volume (SV) is defined at the volume of blood pumped from the left ventricle per beat. There is a major decrease in the output of the stroke volume in compared to the normal output.

Why is giving Beta blockers advantageous?

Beta blocker therapy reduces infarct size thus lowering the risk of death when continued on long term. there is decreased oxygen demand due to the reductions in heart rate, blood pressure, and contractility, and the consequent relief of ischemic chest pain. Along with this there is reduced risk of ventricular fibrillation.

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