Successful administration of clazosentan in subarachnoid hemorrhage patient with severe heart failure.

Background: Clazosentan, an endothelin receptor antagonist, has been shown to prevent cerebral vasospasms following subarachnoid hemorrhage (SAH) effectively. However, clazosentan-induced pulmonary edema is a frequently reported adverse effect and a primary reason for discontinuing treatment. The presence of preexisting heart conditions predisposes patients to severe pulmonary edema; thus, the administration of clazosentan is generally contraindicated. Case Description: We report the successful administration of clazosentan in a 58-year-old female patient with SAH and severe heart failure (Takotsubo cardiomyopathy). The patient initially presented with a ruptured left internal carotid posterior communicating artery aneurysm, leading to SAH. She successfully underwent neck clipping, and postoperative treatment to prevent cerebral vasospasm, including clazosentan, was initiated. Following the emergency surgical intervention, she exhibited pulmonary edema and diffused left ventricular hypokinesis with an ejection fraction of 10-20%. Although drug-induced pulmonary edema emerged after the administration of clazosentan, tailored fluid management based on daily cardiac function and ventilator management in response to pulmonary edema enabled the completion of a 2-week clazosentan therapy regimen. This approach guaranteed the patient's stability throughout the treatment period. Neither cerebral vasospasm nor cardiopulmonary complications were observed. Conclusion: This case highlights the importance of a multidisciplinary approach in managing complex patients with severe cardiac comorbidities undergoing clazosentan therapy.