Cardio Day 2 classes 9 and 10

Bradycardia is considered when there is any heart rate that is ______

• greater than 100 beats per minute
• between 60 and 100 beats per minute
• exactly 80 beats per minute
• less than 60 beats per minute

Delay or interruption in transmission of an impulse from the atria to the ventricles

• Atrioventricular block (AV block)
• Ventricular tachycardia
• Atrial fibrillation
• Myocardial infarction
• atrial tachycardia

Prolonged PR interval that is more than .2 seconds

• First degree AV block

• Second degree AV block

• Third degree AV block

• Fourth degree AV block

Intermittent atrial conduction to the ventricle; Some P waves fail to produce QRS complex

• First-degree AV block
• Complete heart block
• Atrial fibrillation
• Second-degree AV block (type I or II)

Progressive increase in PR interval until a QRS complex s dropped; blocking of AV node

• Normal AV conduction with no block
• Type II second-degree AV block (Mobitz type I)
• Type I second-degree AV block (Wenckebach)
• Complete heart block (third-degree AV block)

No atrial impulses conduct to the ventricle-- atria and ventricles are controlled by different pacemakers

• Normal AV conduction with no block
• Type II second-degree AV block (Mobitz type I)
• Type I second-degree AV block (Wenckebach)
• Complete heart block (third-degree AV block)

Sudden drop of QRS complex without a change in PR interval (every QRS is preceded by a P but every P is NOT followed by a QRS). Blocking of bundle of His or bundle branches.

• Atrial fibrillation
• Second degree AV heart block (Mobitz Type II)

• Complete heart block (third-degree AV block)
• First-degree AV block

RSR configuration on leads V1 V2 V3 on ECG with bradycardia is indicative of _______

• Left Bundle Branch Block (LBBB)
• Atrial Fibrillation
• Right Bundle Branch Block (RBBB)
• PSVTs

A 55-year-old male presents to the emergency department with severe, crushing chest pain radiating to his left arm for the past 45 minutes. He appears diaphoretic and anxious. His ECG is shown below. What is the most likely diagnosis?

• Atrial fibrilation

• Ventricular tachycardia

• stable angina

• ST elevation myocardial infarction (STEMI)

LAD myocardial infarction causes ST elevation on which leads

• V2, V3, V4

• I, II, III, IV
• V5, V6, V7, V8
• V1, V2, V5, V6