For which of the following patients is isopro-terenol contraindicated?Patients with narrow-angle…

➤ How does isoproterenol affect people with pheochromocytoma?
In pheochromocytoma, catecholamine‑secreting tumors produce unstable blood pressure and arrhythmias. Isoproterenol increases heart rate and myocardial workload, which can destabilize hemodynamics and provoke severe hypertension, arrhythmias, or ischemia. Avoid isoproterenol in confirmed or suspected pheochromocytoma.