ECG - common chest pain presentations

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Last updated: August 19, 2024

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Hint	Answer
Myocardial Infarcation	ST elevation, T wave inversion
Unstable angina	ST depression, T wave inversion
Stable angina	No ECG findings at rest
Pericarditis	Saddle ST elevation, PR depression, T wave inversion
Pericardial effusion	Sinus tachycardia, low voltage QRS
Cardiac tamponade	Sinus tachycardia, low voltage QRS
Pulmonary embolism	Sinus tachycardia, RBBB, S1Q3T3
Infective endocarditis	No ECG findings
Supraventricular tachycardia	Regular narrow complex tachycardia, P waves absent
Atrial fibrillation	Irregularly irregular, P waves absent
Atrial flutter	Sawtooth pattern, 2:1 or 3:1 A:V ratio
Wolff-Parkinson-White syndrome	Short PR interval, slurred upstroke of QRS, wide QRS complex
Brugada syndrome	Saddle ST elevation, RBBB

Hint	Answer
Hypertrophic cardiomyopathy	Left ventricular hypertrophy LBBB
Aortic dissection	No ECG findings
LBBB	WiLLiaM - widened QRS, W shaped QRS V1, M shaped QRS V6
RBBB	MaRRoW - widened QRS, M shaped QRS V1, W shaped QRS V6
Hypokalaemia	Inverted T waves, prolonged QT interval, ST depression, prominent U waves
Hyperkalaemia	Peaked T waves, widened QRS, absent P waves
Hypocalcaemia	Prolonged QT interval
Hypercalcaemia	Shortened QT interval, J waves
Torsades de pointes	tachycardia, twisting QRS direction and amplitude, prolonged QT interval complication of hypocalcaemia/kalaemia
Normal PR interval	120-200ms
Normal QRS width	80-100ms
Normal QT interval	350-450ms