An accelerometer based system to measure myocardial performance index during stress testing

Area of Science:

• Cardiology
• Biomedical Engineering
• Medical Diagnostics

Background:

• Stress testing evaluates heart performance under elevated conditions to diagnose cardiac issues.
• The Tei index is a reliable echocardiographic measure of systolic and diastolic heart function.
• Classical echocardiographic indices have limitations in assessing cardiac performance.

Purpose of the Study:

• To explore the use of seismocardiography (SCG) for assessing myocardial performance during stress testing.
• To investigate the calculation of a Tei index-based metric using SCG data.
• To evaluate the potential of SCG, alongside ECG, for enhanced cardiac monitoring during stress tests.

Main Methods:

• An accelerometer was used to record mechanical events of the cardiac cycle (seismocardiogram - SCG).
• Timing measurements from SCG data were used to calculate a myocardial performance metric.
• The study explored an exploratory approach to SCG analysis for cardiac diagnostics.

Main Results:

• SCG captures mechanical events of each cardiac cycle, providing data on heart activity.
• A Tei index-based metric for myocardial performance was calculable from SCG timing measurements.
• The integration of SCG with ECG shows promise for deeper cardiac insights during stress testing.

Conclusions:

• Seismocardiography (SCG) offers a novel method for evaluating cardiac mechanical actions.
• SCG data can be utilized to derive metrics like the Tei index for myocardial performance assessment.
• Combining SCG with ECG during stress testing may significantly enhance the monitoring and diagnosis of heart conditions.