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Sample ECG before balloon pulmonary angioplasty. Annotation: A 65-year-old female patient (mPAP: 63 mmHg, PVR: 1073 dyn∗sec∗cm−5), QRS axis > 90°, P dextroatriale (P in II > 0.25 mV), right ventricular hypertrophy (Sokolow–Lyon index: 1.6 mV), multiple T-wave inversions (II, III, aVF, V1, V3, V4), R V1, V2 + S I, aVL − S V1 > 0.6 mV (1.05 mV).
