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Boards 2e
B2 Electrocardiography
Question | Answer |
---|---|
Atrial depolarization | P wave |
Ventricular depolarization | QRS complex |
Ventricular repolarization | T wave |
identify age of infarct | ST -T |
Early MI (or hyperacute) | elevated ST - T |
Hallmark of MI | Q Wave |
Chronic MI/days to weeks | Wider Deeper Q wave |
Acute/hours post MI | elevated S-T |
Sub-acute/hours to days post MI | elevated S-T, inverted T |
Weeks to months post MI | Q still wide and deep |
P:QRS 1:1 HR 140-250 | Paroxysmal Tachycardia |
Many ill-defined P-waves | Atrial fibrillation |
May result in CVA | Atrial fibrillation |
Saw-tooth" waves | Atrial flutter |
rapid uncoordinated ventricular contraction | Ventricular Fibrillation |