Which classification of dysrhythmia is most common with an inferior wall infarction in the first hour after ST segment elevation myocardial infarction (STEMI)?
A) Sinus tachycardia
B) Multifocal PVCs
C) Atrial fibrillation
D) Sinus bradycardia

Question

Quizplus · Accepted Answer

Sinus bradycardia (heart rate less than 60 beats/min)occurs in 30% to 40% of patients who sustain an acute myocardial infarction (MI).It is more prevalent with an inferior wall infarction in the first hour after ST segment elevation MI.Sinus tachycardia (heart rate more than 100 beats/min)most often occurs with an anterior wall MI.Premature atrial contractions (PACs)occur frequently in patients who sustain an acute MI.Atrial fibrillation is also common and may occur spontaneously or may be preceded by PACs.Premature ventricular contractions (PVCs)are seen in almost all patients within the first few hours after an MI.

Which Classification of Dysrhythmia Is Most Common with an Inferior