Related Experiment Videos
Late cardiac deaths after isolated valve replacement for aortic stenosis. Relation to impaired left ventricular
1Department of Thoracic and Cardiovascular Surgery, Skejby Sygehus/Aarhus University Hospital, Denmark.
Insights
Long-term survivors of aortic stenosis valve replacement face cardiac death risks. Impaired diastolic function and residual left ventricular hypertrophy predict these events, highlighting the need for monitoring post-surgery.
Area of Science:
- Cardiology
- Cardiovascular Surgery
Background:
- Aortic stenosis (AS) necessitates valve replacement surgery.
- Long-term outcomes after AS surgery require ongoing evaluation.
- Predicting cardiac mortality in post-valve replacement patients is crucial.
Purpose of the Study:
- To identify predictors of cardiac death in patients 10-17 years after aortic stenosis valve replacement.
- To assess the relationship between residual left ventricular (LV) hypertrophy and LV performance.
- To evaluate the predictive value of LV function indices for cardiac mortality.
Main Methods:
- Follow-up study of 63 patients post-aortic stenosis valve replacement.
- Utilized radionuclide cardiography to assess LV systolic and diastolic performance.
- Employed logistic regression (LR) analysis to identify predictors of cardiac death.
Main Results:
- Residual LV hypertrophy inversely correlated with LV systolic and diastolic performance.
- LR model achieved 100% positive predictive value for cardiac deaths (10/10).
- Impaired diastolic performance emerged as the primary predictor of cardiac mortality.
Conclusions:
- Diastolic dysfunction is a key indicator of cardiac death risk in long-term AS surgery survivors.
- Residual LV hypertrophy is linked to depressed LV function.
- Peak filling rate was the only LV performance index with independent predictive value.
Abstract:
Sixty-three patients took part in a follow-up study ten to seventeen years after valve replacement for aortic stenosis. Data obtained were used to predict cardiac deaths (n = 14) occurring in the following three-year period. The degree of residual left ventricular (LV) hypertrophy correlated inversely with indices for LV systolic and diastolic performance (radionuclide cardiography). A logistic regression (LR) model had a positive predictive value for cardiac deaths of 100% (10/10) with 8% (4/53) false negatives. Evaluating LV performance indices exclusively, LR analysis showed that only peak filling rate had independent predictive value. Subnormal and normal LV ejection fractions were associated with equal three-year cardiac death rates (29%). Depressed LV function was related to residual hypertrophy. Impaired diastolic performance was the prime predictor of cardiac deaths.