1. Heart failure (I50, NYHA II-IV) or atrial fibrillation (I48, EHRA II-IV) or resistant hypertension (I10-15, ≥ 3 antihypertensive medicines from different drug classes, SBP > 140 /90mmHg or ≥ 4 antihypertensives irrespective of the blood pressure, with at least one drug being a diuretic).