Enhanced external counterpulsation improves skin oxygenation and perfusion

Area of Science:

• Cardiovascular Physiology
• Dermatology
• Hemodynamics

Background:

• Enhanced external counterpulsation (EECP) modulates blood pressure and enhances organ perfusion.
• Potential applications of EECP include treating skin malperfusion.
• This study investigates EECP's acute effects on superficial skin blood flow and gas pressures.

Purpose of the Study:

• To assess the acute effects of EECP on superficial skin blood flow.
• To evaluate changes in transdermal oxygen and carbon dioxide pressures during and after EECP.
• To compare these effects in healthy young individuals and older patients with coronary artery disease.

Main Methods:

• Measurements included heart rate, blood pressure, transdermal blood flow, oxygen, and carbon dioxide pressures.
• Data collected from 23 healthy young adults and 15 older patients with coronary artery disease.
• Statistical analysis used the Friedman test to compare pre-EECP, during-EECP, and post-EECP measurements.

Main Results:

• EECP increased heart rate and mean blood pressure in both groups.
• Transdermal oxygen pressure and red blood cell concentration increased during EECP.
• Transdermal carbon dioxide pressure and red blood cell velocity decreased during EECP, with some effects persisting post-treatment.

Conclusions:

• EECP enhances skin oxygenation and facilitates carbon dioxide removal.
• These effects are attributed to increased erythrocyte concentration and reduced flow velocity, suggesting prolonged tissue contact time.
• Observed changes indicate peripheral vasodilation induced by EECP.