Aortic pulse wave analysis and functional capacity of heart transplantation candidates: a pilot study

Area of Science:

• Cardiology
• Vascular Physiology
• Transplantation Medicine

Background:

• Heart transplantation (HT) is a critical intervention for end-stage heart failure.
• Assessing cardiovascular parameters and functional capacity is vital for evaluating HT outcomes.
• The Duke Activity Status Index (DASI) is a common measure of functional capacity.

Purpose of the Study:

• To compare cardiovascular parameters and functional capacity before and after HT.
• To compare cardiovascular parameters and functional capacity between HT candidates and a control group.
• To investigate the relationship between improved left ventricular ejection fraction (LVEF) and functional capacity post-HT.

Main Methods:

• Utilized the Mobil-O-Graph for cardiovascular parameter assessment.
• Employed the Duke Activity Status Index (DASI) for functional capacity evaluation.
• Compared 24 HT candidates with 24 healthy controls.

Main Results:

• Post-HT, significant increases in peripheral/central vascular pressures, cardiac output, and pulse wave velocity were observed.
• Despite a marked increase in LVEF post-HT, functional capacity did not improve.
• HT candidates exhibited lower functional capacity, stroke volume, and arterial pressures compared to controls, consistent with advanced heart failure.

Conclusions:

• HT improves cardiovascular function but does not fully restore functional capacity.
• Pre-HT cardiovascular parameters and functional capacity are significantly impaired in candidates.
• Advanced heart failure significantly impacts functional capacity, even with improved LVEF post-transplantation.