A resting ECG trace may show evidence of an enlarge left atrium (wide P wave), an enlarged left ventricle (tall R wave, wide QRS complex, shift of mean electrical axis to the left) and rhythm disturbances such as sinus tachycardia, [[Atrial Fiblrillation|atrial fibrillation]], [[Supraventricular Premature Complexes|atrial premature complexes]] and atrial tachycardia.
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A resting ECG trace may show evidence of an enlarge left atrium (wide P wave), an enlarged left ventricle (tall R wave, wide QRS complex, shift of mean electrical axis to the left) and rhythm disturbances such as sinus tachycardia, [[Atrial Fibrillation|atrial fibrillation]], [[Supraventricular Premature Complexes|atrial premature complexes]] and atrial tachycardia.