ECG Markers of Hemodynamic Improvement in Patients with Pulmonary Hypertension.

Electrocardiogram may be useful in predicting hemodynamic effects of targeted therapy in precapillary pulmonary hypertension. Decrease of RV1, max⁡RV1,2 + max⁡SI,aVL - SV1, and PII corresponds with hemodynamic improvement after treatment. Of these changes a decrease of R wave amplitude in V1 is associated with better survival.