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Personne :
Boudreault, Jean-Roch

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Boudreault

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Jean-Roch

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Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval

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ncf11892634

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  • PublicationRestreint
    Usefulness of measuring net atrioventricular compliance by Doppler echocardiography in patients with mitral stenosis
    (Elsevier, 2005-08-01) Boudreault, Jean-Roch; Déry, Jean-Pierre; Pibarot, Philippe; Dumesnil, Jean G.; Li, Mingzhou
    Twenty-six patients with severe pure mitral stenosis underwent Doppler echocardiographic examination and cardiac catheterization within the same day before the realization of mitral valve balloon valvuloplasty. Net atrioventricular compliance estimated by Doppler echocardiography from the ratio of mitral valve effective orifice area and E-wave downslope was a major independent determinant of left atrial and pulmonary arterial pressures measured by catheterization.
  • PublicationRestreint
    Predicting late myocardial recovery and outcomes in the early hours of ST-segment elevation myocardial infarction : traditional measures compared with microvascular obstruction, salvaged myocardium, and necrosis characteristics by cardiovascular magnetic resonance
    (Elsevier, 2010-06-01) Bertrand, Olivier; Noël, Bernard; Woerly, Stéphane; De Larochellière, Robert; Boudreault, Jean-Roch; Larose, Éric; Rodés-Cabau, Josep; Barbeau, Gérald; Nguyen, Can Manh; Rouleau, Jacques; Proulx, Guy; Amyot, Marc; Déry, Jean-Pierre; Pibarot, Philippe; Roy, Louis; Gleeton, Onil
    Objectives : The aim of this study was to determine whether a very early imaging strategy improves the prediction of late systolic dysfunction and poor outcomes in ST-segment elevation myocardial infarction (STEMI) compared with traditional predictors. Background : Earlier prediction of poor outcomes after STEMI is desirable, because it will allow tailored therapy at the earliest possible time, when benefits might be greatest. Methods : One hundred and three patients with acute STEMI were studied by contrast-enhanced cardiovascular magnetic resonance within 12 h of primary angioplasty and at 6 months and followed >2 years. The primary end point was left ventricular (LV) dysfunction, whereas poor outcomes were a key secondary end point. Results : Traditional risk factors were only modest predictors of late LV dysfunction. Late gadolinium enhancement (LGE) volume maintained a stronger association to LV ejection fraction change than infarct transmurality, microvascular obstruction, or myocardial salvage during STEMI (p = 0.02). Multivariable logistic regression identified LGE volume during STEMI as the best predictor of late LV dysfunction (odds ratio: 1.36, p = 0.03). An LGE =23% of LV during STEMI accurately predicted late LV dysfunction (sensitivity 89%, specificity 74%). The LGE volume provided important incremental benefit for predicting late dysfunction (area under the curve = 0.92, p = 0.03 vs. traditional risk factors). Twenty-three patients developed poor outcomes (1 death, 2 myocardial infarctions, 5 malignant arrhythmias, 4 severe LV dysfunction <35%, 11 hospital stays for heart failure) over 2.6 ± 0.9 years; LGE volume remained a strong independent predictor of poor outcomes, whereas LGE =23% carried a hazard ratio of 6.1 for adverse events (p < 0.0001). Conclusions : During the hyperacute phase of STEMI, LGE volume provides the strongest association and incremental predictive value for late systolic dysfunction and discerns poor late outcomes.