Inferior MI (myocardial infarction) is a common clinical diagnosis made in both the inpatient and emergency room settings. Some clinical and ECG findings associated with inferior MI are:
ECG
1. II, III, and AVF affected
2. AV block (more common in women)
Coronary Artery Involved
right coronary involved
Cardiac Areas Affected
1. SA node (55%)
2. AV node (90%)
3. Bundle of His
4. left bundle branch – posterior inferior division
5. Right atrium and ventricle
6. left ventricle inferior surface
7. posterior 1/3 of septum
Clinical Complications
1. Sinus node disturbances including sinus arrest, bradycardia, and block
2. AV block – Wenckebach (Mobitz I) is common but third degree block is reported
3. Papilary muscle rupture
4. Enhanced vagal stimulation can cause nausea, vomiting, hypotension and hiccups
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