Sinus bradycardia with left ventricular hypertrophy by voltage criteria

What is the electrocardiographic diagnosis?

Sinus bradycardia with left ventricular hypertrophy by voltage criteria (SV1 + RV6 = 40 mm). Voltage criteria are the least specific, though quite sensitive, for detecting ventricular hypertrophy. Different criteria has be applied in children due to lower attenuation by the thinner chest wall. Ventricular rate is calculated by dividing 1500 by the measured RR interval in mm, provided the ECG has been recorded at a paper speed of 25 mm/s. If the rate is between 60 – 100/min in sinus rhythm, it is normal sinus rhythm. If the rate is below 60 per minute, it is called sinus bradycardia. Rate above 100/min is taken as sinus tachycardia. In sinus rhythm the P waves are upright in lead I and inferior leads because the activation proceeds from above downwards and towards the left in the atria as the sinus node is situated in the upper part of the right atrium, near the superior vena caval orifice.