Relation between apexcardiographic a wave and posterior aortic wall motion

Area of Science:

• Cardiology
• Biomedical Engineering
• Diagnostic Imaging

Background:

• Left ventricular end-diastolic pressure (LVEDP) is a critical indicator of cardiac function.
• Accurate noninvasive measurement of LVEDP remains a clinical challenge.
• Existing methods for assessing LVEDP may be invasive or lack precision.

Purpose of the Study:

• To investigate the utility of posterior aortic root motion during atrial systole as a noninvasive index for assessing LVEDP.
• To correlate apexcardiogram (a/OE ratio) and echocardiogram (A/OV ratio) measurements with LVEDP.
• To evaluate the relationship between these noninvasive parameters and left ventricular compliance.

Main Methods:

• Recorded left ventricular end-diastolic pressure, apexcardiograms, and aortic root echocardiograms in 24 patients.
• Calculated the atrial to total amplitude ratio (a/OE) from apexcardiograms.
• Measured posterior aortic wall motion (A/OV ratio) from echocardiograms.

Main Results:

• A significant positive correlation was found between the a/OE ratio and LVEDP (r = 0.82).
• A significant positive correlation was observed between the A/OV ratio and LVEDP (r = 0.75).
• A strong positive correlation existed between the a/OE and A/OV ratios (r = 0.81).

Conclusions:

• The amplitude of posterior aortic root motion during atrial systole is a useful noninvasive index.
• This parameter can aid in the assessment of left ventricular compliance.
• Echocardiographic measurement of aortic root motion offers a promising method for estimating LVEDP.