Protective effect of left ventricular hypertrophy in right coronary artery occlusions.
Arq Bras Cardiol
; 72(2): 161-70, 1999 Feb.
Article
en En, Pt
| MEDLINE
| ID: mdl-10488575
ABSTRACT
OBJECTIVE:
To test the hypothesis that left ventricular hypertrophy (LVH) reduces the electrocardiographic and functional effects of right coronary artery occlusion.METHODS:
We analysed 215 patients (166 males and 49 women, age of 58.9 +/- 10.6 years), with occlusion of the right coronary artery without other associated lesions. There was no significant difference (p > 0.05) in age and gender distribution between the 78 patients with LVH (left ventricular mass > 100 g/m2) (Group A) when compared with the 137 patients without LVH (left ventricular mass < 100 g/m2) (Group B).RESULTS:
The electrocardiographic finding of transmural necrosis was more often found in group B patients than in group A patients (56.9% and 30.8%, respectively; p < 0.05). The left ventricular function parameters of group A were better than those of group B the ratio end-diastolic pressure/systolic pressure (EDP/SP) (A 0.108 +/- 0.036; B 0.121 +/- 0.050; p < 0.05); the end-diastolic volume index (A 75.9 +/- 31.3 ml/m2; B 88.0 +/- 31.0 ml/m2; p < 0.01); the end-systolic volume index (A 16.0 +/- 10.0 ml/m2; B 27.0 +/- 20.0 ml/m2; p < 0.001); the ejection fraction (A 78.6 +/- 10.8%; B 67.7 +/- 17.9%; p < 0.001); the anteroinferior shortening (A 43.9 +/- 10.3%; B 35.1 +/- 12.8%; p < 0.001). A higher degree of coronary tortuosity was observed in group A than in group B (78.2% and 24.1%; p < 0.001) and also a more frequent absent or minimal diaphragmatic hypokinetic area (A 80.8%; B 54.0%; p < 0.05).CONCLUSION:
LVH reduces the effects of myocardial sequela and protects LV function when right coronary occlusion develops.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Hipertrofia Ventricular Izquierda
/
Enfermedad Coronaria
Tipo de estudio:
Etiology_studies
/
Incidence_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
/
Pt
Revista:
Arq Bras Cardiol
Año:
1999
Tipo del documento:
Article
País de afiliación:
Brasil