Question

Mr smith a 68 year old man was admitted to the ER for an acute myocardial infarction. He fainted twice during the hospitalization. his ECG showed the following cycles. predominantly normal cycles showing all the normal waves. Prolonged PR interval ( normal 120-200ms). Occasional p waves that are not followed by QRS (non conducted p waves).

Question for Mr smith case:
1. What is the diagnosis based on his ECHO?
2. What is the cause of his longer than normal PR interval?
3. why did Mr smith faint?
4. Mr smith was treated with atropine. How might atropine have helped him from fainting?

Answer 1

ANSWER 1

prolonged PR interval shows delayed conduction of the SA, nodal impulse to the ventricles and is called first-degree AV block, observations of P wave changes in association with left ventricular failure. also may indicate left ventricular disease as well as acute left atrial distension,

ANSWER 2

first degree AV block cause  a prolonged PR interval , a prolonged PR interval is associated with increased risk of atrial fibrillation, pacemaker implantation, heart failure .

ANSWER3

the AV block and heart attack caused him the Chest pain or pressure and Shortness of breathing and this can cause the faint condition of the Mr smith. the main reason was less oxygen in blood.

ANSWER 4

Atropine increases heart rate and increase the atrioventricular conduction by blocking the parasympathetic effect on heart