When is loss of responsiveness to a vasodilator agent in the patient with congestive heart failure due to tachyphylaxis?
D006333:Heart Failure / Q000188:drug therapy* / Q000209:etiology; D006801:Humans; D013618:Tachyphylaxis; D014665:Vasodilator Agents / Q000009:adverse effects*
D014665:Vasodilator Agents