Potential influencing factors on plasma PACAP-38 levels. ACEI: angiotensin-converting enzyme inhibitor, ARB: angiotensin-II receptor blocker, MRA: mineralocorticoid receptor antagonist, CRT: cardiac resynchronization therapy, ICD: implantable cardioverter-defibrillator, EF: ejection fraction, LV-EDD: left ventricular end-diastolic diameter, RV-EDD: right ventricular end-diastolic diameter, IVC: inferior vena cava size, LDL: low-density lipoprotein, HDL: high-density lipoprotein. Spearman’s correlation test was performed.