TOPICS: Isosorbide dinitrate, isosorbide mononitrate, nitroglycerin, bioavailability, nitric oxide, cgmp, myosin light chain dephosphorylation, venous capacitance, ivc, preload, hypertrophic obstructive cardiomyopathy, myocardial oxygen demand, angina, acs, fluid overload, pulmonary edema, esophageal spasm, rv infarction, hypotension, phosphodiesterase inhibitor, reflex tachycardia, beta blockers, cutaneous flushing, headaches, monday disease