Correlation between diastolic seismocardiography variables and echocardiography variables

Area of Science:

• Cardiology
• Biomedical Engineering
• Medical Diagnostics

Background:

• Echocardiography is a standard tool for assessing cardiac function and hemodynamics.
• Seismocardiography (SCG) offers a promising non-invasive method for rapid myocardial performance evaluation.

Purpose of the Study:

• To determine the correlation between SCG signals and echocardiographic measurements.
• To assess SCG's ability to detect preload reduction using a head-up tilt test.

Main Methods:

• Simultaneous recording of SCG and electrocardiogram in 45 subjects, followed by echocardiography.
• Analysis of SCG signals using a Markov model and fiducial point detection for diastolic components.
• Comparison of SCG amplitudes with echocardiographic diastolic variables (e.g., e') under supine and head-up tilt conditions.

Main Results:

• A significant correlation (0.713, P < 0.001) was found between diastolic SCG amplitudes and the echocardiographic variable e'.
• The second diastolic minimum in SCG correlated well with preload reduction during head-up tilt.
• Most echocardiographic variables, except E/e', showed high correlation between supine and tilt positions.

Conclusions:

• Diastolic SCG amplitudes strongly correlate with echocardiographic diastolic function (e').
• SCG shows potential as a tool for evaluating diastolic function.
• SCG can detect hemodynamic changes induced by preload alterations.