NPPB and atrial fibrillation: Elevated levels of NT-proBNP and high sensitivity troponin I (hs-TnI) were significantly associated with arrhythmias in a study by Bissel et al., in which two out of 19 patients had episodes of SVT, two had AFL, three had AFib and two had nonsustained ventricular tachycardia (NSVT) [11].