Prolonged hemodynamic effect of a slow-release nitroglycerin ointment

Area of Science:

• Cardiology
• Pharmacology

Background:

• Nitroglycerin (NTG) ointment is established for treating angina pectoris and congestive heart failure.
• Conventional NTG ointments typically provide relief for 4 to 6 hours.

Purpose of the Study:

• To evaluate the hemodynamic effects of a novel slow-release NTG ointment.
• To determine the duration of action for the slow-release NTG formulation.

Main Methods:

• Twenty patients with coronary artery disease participated in the study.
• Serial gated equilibrium radionuclide ventriculography was used to assess hemodynamic parameters.
• Measurements were taken before, during continuous once-daily use (≥24 hours), and after cessation of the slow-release NTG ointment.

Main Results:

• Slow-release NTG significantly reduced left ventricular volumes at rest and during exercise (p < 0.005).
• Ejection fraction increased significantly at rest (p < 0.0005), and peak systolic pressure to end-systolic volume ratio improved (p < 0.05).
• Hemodynamic improvements persisted for at least 24 hours and returned to baseline 4 days after treatment cessation.

Conclusions:

• Slow-release NTG ointment demonstrates prolonged hemodynamic benefits lasting over 24 hours.
• This formulation may offer a practical once-daily therapeutic option for managing angina pectoris and congestive heart failure.
• The effects are reversible upon discontinuation of the treatment.