Arrhythmia causes

Question 1

1st degree AV block

Answer 1

• Atherosclerosis, HTN, DM
• Fibrosis CHD
• CAD
• BB, CCB, Digitalis, anti arrhythmia
• hypothyroid, hyperthyroid, adrenal insufficiency
• RF, SLE, MCTD, myocarditis
• Amyloidosis, Sarcoid, hemochromatosis
• Mitral or aortic calcification

Question 2

Mobitz 1

Answer 2

• Digitalis toxicity
• Inferior MI!!!
• Myocarditis

Question 3

Mobitz 2

Answer 3

• Ischemic heart disease
• Anterior MI!!!!!!!!
• Degeneration of conduction system

Question 4

Third Degree Heart block

Answer 4

• Ischemia
• Infiltrative disease
• Cardiac surgery: by-pass, valve replacement, myocarditis, degenerative
• Need to treat this with a pacemaker

Question 5

RBBB

Answer 5

• RV diastolic volume overload
• WPW syndrome
• RVG
• Duchenne dystrophy

Question 6

LBBB

Answer 6

• HTN, Ischemia, aortic stenosis, cardiomyopathy
• LBBB with LAD: more myocardial dysfunction, more disease in conduction system, maybe higher mortality
• LBBB w/ RAD: think Congestive cardiomyopathy