Figure 3.

Right ventricular hypertrophy classification by the RV region predominantly hypertrophied and its corresponding lead. RV trabecular region: V₂ and V₃. When tetraphasic QRS is registered in V₂–V_3, Ebstein's anomaly is one diagnostic possibility; Inferior right paraseptal region: V₃ and V₄; RV free wall: from V₁ to V₄; Basal infundibular region, RVOT or crista supraventricularis: aVR, V_1H, V_2H, and V_3H; RV inflow tract: V_4R, V_5R, and aVF. Ao: aorta; IVC: inferior vena cava; PA: pulmonary artery; RA: right atrium; RV: right ventricle; RVOT: right ventricular outflow tract; SVC: superior vena cava