Table 2. Predictive values of ECG patterns suggestive of right ventricular hypertrophy or right atrial enlargement for the diagnosis of PH in the PAPUCO registry (RSVP > 35 mmHg).

ECG criterion	Sensitivity (%)	Specificity (%)	Positive predictive values (%)	Negative predictive values (%)
QRS axis ≥ 100°	38.5	94.7	62.5	87.1
Extreme axis deviation (QRS > 190°)	6.2	100.0	100.0	82.4
R/S ratio in V1 > 1 or R in V1 > 7 mm	47.7	95.8	72.1	88.9
Definite right ventricular hypertrophy	30.8	100.0	100.0	86.4
• QRS axis ≥ +100°; and
• R/S ratio in V1 ≥ 1 or R in V1 > 7 mm
Right bundle branch block and QRS right-axis deviation (≥ 100°)	1.5	99.0	25.0	81.5
P > 2.0 mm in lead II or > 1.5 mm in lead V1/V2, unchanged duration	36.9	79.3	28.9	84.6