Tricuspid Atresia

Report:

Atrial tachycardia 150/min, variable block

Ventriculophasic effect

Left axis deviation –35o

Nonspecific ST/T changes

Prolonged QT interval

Comment:

The P waves are very broad and widely notched, like the sinus P waves (Fig 150a below). Both are most prominent in Lead 1. It could be a sinoatrial tachycardia.

Tricuspid atresia is usually associated with LAD in the frontal plane. This is not LAHB: the degree of LAD is modest and there are secondary R waves in all three inferior leads.

The secondary R wave in V1 is of course spurious, caused by the superimposed blocked atrial wave.

150a. 151. 40 year old man with chest and trapezius ridge pains

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