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Cardiovascular System

Sections:
Cardiac Physiology: Atrial Fibrillation, Cardiac Physiology: Premature Ventricular Contractions, Cardiac Physiology: Cardiac Failure, Cardiac Physiology: Aerobic Exercise, Circulatory System: Vascular System, Circulatory System: Hemorrhagic Shock 1, Circulatory System: Hemorrhagic Shock 2, Circulatory System: Aerobic Exercise, Circulatory System: Essential Hypertension, Circulatory System: Secondary Hypertension, Renal Artery Stenosis, Blood Disorders: Idiopathic Aplastic Anemia, Blood Disorders: Hemophilia A, Blood Disorders: Pulmonary Embolism.

Topics Discussed:
artificial cardiac pacemaker; atrial flutter; atropine; conduction, cardiac; electrocardiogram; heart block; p wave feature; qrs complex feature; second degree atrioventricular block.

Excerpt:

Cardiac Physiology: Heart Block

JG is a 72-year-old retired business executive. He was hospitalized following an acute myocardial infarction. JG was sitting in a chair visiting with his wife when he suddenly fainted. The attending physician examined his electrocardiogram (ECG) and noted the development of Mobitz Type II Heart Block. It was a 3:1 block where one out of three P waves was followed by a QRS complex. The patient was immediately scheduled for the insertion of an artificial cardiac pacemaker.

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