Troponin = 0.27 ng/ml, peaking at 4.68 ng/ml. BNP = 329. Initial ECG demonstrated sinus tachycardia with borderline prolonged QT. Echo showed EF of 20–25% with basal and mid anterior wall motion abnormalities as well as basal and mid-septal abnormalities. On day 6, coronary angiography revealed normal coronaries. Viral and autoimmune work-up was negative for cardiomyopathy. Right ventricular biopsy was negative. This evidence concerns the gene NPPB and Tachycardia.