Changes in left ventricular stroke volume measured by Doppler echocardiography

Area of Science:

• Cardiology
• Medical Imaging
• Hemodynamics

Background:

• Coronary artery disease (CAD) poses significant cardiovascular risks.
• Accurate stroke volume measurement is crucial for assessing cardiac function in CAD patients.
• Current methods for stroke volume assessment can be invasive or limited.

Purpose of the Study:

• To evaluate the reliability of Doppler echocardiography for measuring cardiac stroke volume.
• To compare Doppler echocardiography measurements with thermodilution in CAD patients.
• To assess Doppler echocardiography's ability to detect rapid changes in stroke volume.

Main Methods:

• Simultaneous measurement of stroke volume using Doppler echocardiography and thermodilution.
• Doppler ultrasound calculated stroke volume from aortic orifice area and flow velocity.
• Dobutamine infusion used to induce controlled changes in stroke volume in a subset of patients.

Main Results:

• Doppler echocardiography and thermodilution measurements showed a close correlation (r = 0.92).
• Ultrasound-derived stroke volume reliably reflected changes induced by dobutamine.
• The method demonstrated high precision in assessing stroke volume dynamics.

Conclusions:

• Doppler echocardiography provides a reliable and non-invasive method for assessing cardiac stroke volume in patients with coronary artery disease.
• This technique can accurately detect dynamic changes in stroke volume, aiding in patient management.
• Doppler echocardiography offers a valuable alternative to thermodilution for stroke volume monitoring in clinical settings.