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Sublingual isosorbide dinitrate for the detection of obstruction in hypertrophic cardiomyopathy
D. Zemánek, P. Tomasov, S. Homolová, K. Linhartová, J. Veselka
Jazyk angličtina Země Velká Británie
Typ dokumentu časopisecké články, práce podpořená grantem
- MeSH
- aplikace sublinguální MeSH
- hypertrofická kardiomyopatie patofyziologie MeSH
- isosorbiddinitrát aplikace a dávkování diagnostické užití MeSH
- lidé středního věku MeSH
- lidé MeSH
- obstrukce výtoku ze srdeční komory komplikace ultrasonografie MeSH
- senzitivita a specificita MeSH
- vazodilatancia aplikace a dávkování diagnostické užití MeSH
- zátěžová echokardiografie MeSH
- zátěžový test MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
AIMS: Hypertrophic cardiomyopathy (HCM) is predominantly associated with left ventricular outflow tract (LVOT) obstruction. The assessment of the obstruction with a provoking test should be a routine part of HCM evaluation. The aim of the study was to determine the utility of a sublingual spray application of isosorbide dinitrate (ISDN) for detection of an obstruction. METHODS AND RESULTS: We have prospectively analysed 77 consecutive HCM patients, measuring the LVOT gradient at rest, using the sublingual spray application of ISDN (2.5 mg; after 2, 5, and 10 min), and with exercise echocardiography. An obstruction was defined as a gradient ≥ 30 mmHg. An obstruction was present in 15 patients (19%) at rest, in 42 patients (55%) after ISDN, and in 55 patients (71%) after exercise. The ISDN test had a sensitivity of 76% and the specificity of 100% relative to exercise echocardiography, while at-rest measurements had a sensitivity of 27% and a specificity of 100%. The chronological difference in the prevalence of obstructions during the ISDN test was statistically significant (P < 0.05); at ISDN plus 2 min, obstructions were seen in only 29 patients (38%, gradient 28.8 ± 25.0 mmHg), however, at ISDN plus 5 and 10 min, obstructions were found in 42 patients (55%, gradient 44.5 ± 39.6 mmHg). CONCLUSION: The ISDN test is a reliable screening method for the detection of an HCM obstruction, however, the measurement should be delayed 5-10 min after the application of ISDN. Patients with negative ISDN tests should undergo exercise echocardiography.
Citace poskytuje Crossref.org
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- $a AIMS: Hypertrophic cardiomyopathy (HCM) is predominantly associated with left ventricular outflow tract (LVOT) obstruction. The assessment of the obstruction with a provoking test should be a routine part of HCM evaluation. The aim of the study was to determine the utility of a sublingual spray application of isosorbide dinitrate (ISDN) for detection of an obstruction. METHODS AND RESULTS: We have prospectively analysed 77 consecutive HCM patients, measuring the LVOT gradient at rest, using the sublingual spray application of ISDN (2.5 mg; after 2, 5, and 10 min), and with exercise echocardiography. An obstruction was defined as a gradient ≥ 30 mmHg. An obstruction was present in 15 patients (19%) at rest, in 42 patients (55%) after ISDN, and in 55 patients (71%) after exercise. The ISDN test had a sensitivity of 76% and the specificity of 100% relative to exercise echocardiography, while at-rest measurements had a sensitivity of 27% and a specificity of 100%. The chronological difference in the prevalence of obstructions during the ISDN test was statistically significant (P < 0.05); at ISDN plus 2 min, obstructions were seen in only 29 patients (38%, gradient 28.8 ± 25.0 mmHg), however, at ISDN plus 5 and 10 min, obstructions were found in 42 patients (55%, gradient 44.5 ± 39.6 mmHg). CONCLUSION: The ISDN test is a reliable screening method for the detection of an HCM obstruction, however, the measurement should be delayed 5-10 min after the application of ISDN. Patients with negative ISDN tests should undergo exercise echocardiography.
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