Abstract
The aim of this study was to detect borderline mitral valve dysfunction in 100 asymptomatic patients with a St. Jude Medical valve. We studied rest and exercise hemodynamics by Doppler echocardiography. Study patients were divided into two groups according to the time since surgery: group A had valves implanted less than 5 years ago (44 patients), group B had valves implanted more than 5 years ago (56 patients). Although patients had no clinical signs of valve dysfunction, group B was found to have significant reduction of mitral valve area (p <0.05). In the group A patients, mean gradients at rest increased from 4 ± 2, 4 ± 2, and 3 ± 1 mmHg in valve sizes of 25, 27, and 29 mm, respectively, to 7 ± 2, 7 ± 3, and 5 ± 2 mmHg with exercise. In the group B patients, mean gradients at rest increased from 7 ± 1, 6 ± 2, and 5 ± 1 mmHg to 14 ± 3, 13 ± 3, and 10 ± 4 mmHg, respectively, after exercise. The percent increase (mean) in peak pressure gradient with exercise was significantly higher in group B (more than 100%) than in group A (less than 80%) (p <0.01). The percent increase in mean gradient with exercise was also significantly higher in group B (more than 100%) than in group A (less than 75%). In conclusion, patients with reduced valve area and more than a 100% increase of peak and mean gradients should be followed up carefully. If any signs or symptoms of heart failure develop, they must be considered as candidates for surgery.
| Original language | English |
|---|---|
| Pages (from-to) | 161-168 |
| Number of pages | 8 |
| Journal | Journal of Cardiac Surgery |
| Volume | 10 |
| Issue number | 2 |
| Publication status | Published - 1995 |
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ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
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Evaluation of St. Jude Medical mitral valve function by exercise Doppler echocardiography. / Shigenobu, M.; Sano, S.
In: Journal of Cardiac Surgery, Vol. 10, No. 2, 1995, p. 161-168.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Evaluation of St. Jude Medical mitral valve function by exercise Doppler echocardiography
AU - Shigenobu, M.
AU - Sano, S.
PY - 1995
Y1 - 1995
N2 - The aim of this study was to detect borderline mitral valve dysfunction in 100 asymptomatic patients with a St. Jude Medical valve. We studied rest and exercise hemodynamics by Doppler echocardiography. Study patients were divided into two groups according to the time since surgery: group A had valves implanted less than 5 years ago (44 patients), group B had valves implanted more than 5 years ago (56 patients). Although patients had no clinical signs of valve dysfunction, group B was found to have significant reduction of mitral valve area (p <0.05). In the group A patients, mean gradients at rest increased from 4 ± 2, 4 ± 2, and 3 ± 1 mmHg in valve sizes of 25, 27, and 29 mm, respectively, to 7 ± 2, 7 ± 3, and 5 ± 2 mmHg with exercise. In the group B patients, mean gradients at rest increased from 7 ± 1, 6 ± 2, and 5 ± 1 mmHg to 14 ± 3, 13 ± 3, and 10 ± 4 mmHg, respectively, after exercise. The percent increase (mean) in peak pressure gradient with exercise was significantly higher in group B (more than 100%) than in group A (less than 80%) (p <0.01). The percent increase in mean gradient with exercise was also significantly higher in group B (more than 100%) than in group A (less than 75%). In conclusion, patients with reduced valve area and more than a 100% increase of peak and mean gradients should be followed up carefully. If any signs or symptoms of heart failure develop, they must be considered as candidates for surgery.
AB - The aim of this study was to detect borderline mitral valve dysfunction in 100 asymptomatic patients with a St. Jude Medical valve. We studied rest and exercise hemodynamics by Doppler echocardiography. Study patients were divided into two groups according to the time since surgery: group A had valves implanted less than 5 years ago (44 patients), group B had valves implanted more than 5 years ago (56 patients). Although patients had no clinical signs of valve dysfunction, group B was found to have significant reduction of mitral valve area (p <0.05). In the group A patients, mean gradients at rest increased from 4 ± 2, 4 ± 2, and 3 ± 1 mmHg in valve sizes of 25, 27, and 29 mm, respectively, to 7 ± 2, 7 ± 3, and 5 ± 2 mmHg with exercise. In the group B patients, mean gradients at rest increased from 7 ± 1, 6 ± 2, and 5 ± 1 mmHg to 14 ± 3, 13 ± 3, and 10 ± 4 mmHg, respectively, after exercise. The percent increase (mean) in peak pressure gradient with exercise was significantly higher in group B (more than 100%) than in group A (less than 80%) (p <0.01). The percent increase in mean gradient with exercise was also significantly higher in group B (more than 100%) than in group A (less than 75%). In conclusion, patients with reduced valve area and more than a 100% increase of peak and mean gradients should be followed up carefully. If any signs or symptoms of heart failure develop, they must be considered as candidates for surgery.
UR - http://www.scopus.com/inward/record.url?scp=0028913542&partnerID=8YFLogxK
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M3 - Article
VL - 10
SP - 161
EP - 168
JO - Journal of Cardiac Surgery
JF - Journal of Cardiac Surgery
SN - 0886-0440
IS - 2
ER -