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Effects of valve dysfunction on Doppler Tei index
Amdadul Haque1, Yutaka Otsuji, Shiro Yoshifuku
1First Department of Internal Medicine, Kagoshima University School of Medicine, 8-35-1 Sakuragaoka, Kagoshima City, 890-8520 Japan.
Summary
The Doppler Tei index, a measure of heart function, significantly changes after valve surgery, particularly in patients with aortic stenosis. This highlights the need to consider valve dysfunction when interpreting the Tei index in heart valve disease patients.
Area of Science:
- Cardiology
- Cardiac Surgery
- Echocardiography
Background:
- The Doppler Tei index assesses combined systolic and diastolic heart function noninvasively.
- Its response to valve dysfunction and surgical repair remains under-investigated.
- This study evaluates the Tei index's changes following aortic or mitral valve surgery.
Purpose of the Study:
- To compare the Doppler Tei index before and after surgical valve replacement or repair.
- To investigate the impact of specific valve dysfunctions (AS, AR, MS, MR) on the Tei index.
- To assess the Tei index's utility in evaluating ventricular function post-valve surgery.
Main Methods:
- Seventy-six patients undergoing aortic or mitral valve surgery were included.
- Doppler Tei index was measured pre- and post-operatively.
- The Tei index calculation involved isovolumic times relative to ejection time.
Main Results:
- The Tei index significantly increased post-surgery in patients with aortic stenosis (AS) and aortic regurgitation (AR).
- A significant increase was also observed in mitral stenosis (MS), while mitral regurgitation (MR) showed a non-significant decrease.
- The greatest percent change in Tei index occurred in patients with AS.
Conclusions:
- The Doppler Tei index demonstrates significant alterations after valve surgery, most notably in AS.
- Valve dysfunction significantly affects Tei index values.
- Careful consideration of valve disease is crucial for accurate Tei index interpretation in clinical practice.