Inductive Plethysmography for aortic Pulse Wave Velocity

Area of Science:

• Cardiovascular physiology
• Biomedical engineering
• Medical instrumentation

Background:

• Aortic stiffening is a significant indicator of cardiovascular risk, associated with conditions like myocardial infarction, heart failure, atherosclerosis, and stroke.
• Current gold standard methods for arterial stiffness evaluation, such as pulse wave velocity (PWV), often measure propagation over combined arterial segments, lacking aortic-specific assessment.
• There is a need for non-invasive techniques that can specifically evaluate aortic stiffness.

Purpose of the Study:

• To investigate the potential of Inductive Plethysmography (IP) for measuring aortic stiffness.
• To assess the feasibility of using thoracic and abdominal IP recordings for estimating aortic pulse wave velocity (PWV).

Main Methods:

• A comparative analysis was performed between PWV estimated using IP and PWV measured from the arm.
• The study involved 11 healthy volunteers.
• Inductive Plethysmography (IP) was utilized to capture signals related to aortic volume changes.

Main Results:

• A significant linear correlation (r = 0.86, p<0.001) was observed between PWV estimated from IP and PWV measured from the arm.
• These findings suggest that IP can provide reliable estimations of aortic stiffness.

Conclusions:

• Inductive Plethysmography (IP) demonstrates potential as a non-invasive method for evaluating aortic stiffness.
• The promising correlation supports further investigation of IP for aortic PWV measurement, particularly in pathological populations.