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Phentolamine continuous infusion in a pediatric patient with uncontrolled hypertension
1Children's Hospital of Colorado, Aurora, CO, USA.
Insights
A pediatric patient with a ventricular assist device and uncontrolled hypertension was successfully treated with phentolamine. This intervention achieved hemodynamic stability, enabling heart transplantation.
Area of Science:
- Pediatric Cardiology
- Cardiovascular Surgery
- Pharmacology
Background:
- Pediatric heart failure often necessitates ventricular assist devices (VADs).
- Uncontrolled hypertension is a significant complication in VAD patients, hindering transplant candidacy.
- Traditional antihypertensive pharmacotherapy can be insufficient in complex pediatric cases.
Observation:
- A 4-month-old male with a VAD presented with severe, refractory hypertension.
- The patient's hemodynamic instability precluded listing for heart transplantation.
- Multiple antihypertensive agents failed to achieve normotension.
Findings:
- Continuous intravenous phentolamine infusion was initiated to target a different antihypertensive mechanism.
- Normotension was achieved within 8 hours of starting the phentolamine infusion.
- The patient was successfully listed for heart transplantation and underwent the procedure.
Implications:
- Continuous phentolamine infusion represents a viable therapeutic option for refractory hypertension in pediatric VAD patients.
- Achieving hemodynamic stability through novel pharmacologic approaches is crucial for transplant eligibility.
- This case highlights the importance of exploring alternative treatments for complex cardiovascular conditions in infants.
Purpose:
A case of uncontrolled hypertension nonresponsive to traditional pharmacologic management in a pediatric patient with a ventricular assist device awaiting a heart transplant is reported.
Summary:
A 4-month-old male in heart failure was experiencing uncontrolled hypertension. Because of a lack of hemodynamic stability, he was unable to be listed as a heart transplant candidate. He received multiple antihypertensive agents (calcium channel blockers, β-blockers, and direct-acting vasodilators) as both intermittent and continuous infusions over the course of several days without achieving normotension. The decision was then made to administer intravenous phentolamine as a continuous infusion to pursue a different mechanism than with traditional antihypertensive agents to achieve hemodynamic stability. Within 8 hours of initiation of the continuous phentolamine infusion, the patient became normotensive and was listed for a heart transplant. The continuous phentolamine infusion was administered over the next 4 days to maintain normotension, and on day 4 the patient underwent successful orthotopic heart transplantation.
Conclusion:
A 4-month-old male in heart failure with a ventricular assist device, experiencing uncontrolled hypertension nonresponsive to traditional pharmacologic management, was successfully treated with a continuous intravenous infusion of phentolamine.
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