This electrocardiogram is within normal limits. The characteristic features demonstrated here include: A normal sinus rhythm of 75 beats per minute. The frontal plane axis is within normal limits at +30°. The P wave is upright in lead II. The QRS shows no pathologic Q waves, evidence of hypertrophy or intraventricular conduction delay. The ST-segments are normally concave, with no pathologic elevation or depression. The T waves are positive in leads I and V2 through v6 with a more gradual upstroke than downstroke.