Decreasing incidence of stroke during valvular surgery

Area of Science:

• Cardiovascular Surgery
• Neurology
• Public Health

Background:

• Stroke following valvular surgery remains incompletely understood.
• Identifying stroke predictors and mechanisms is crucial for patient outcomes.

Purpose of the Study:

• To examine the incidence, predictors, and mechanisms of stroke during valvular procedures.
• To analyze stroke trends over a 15-year period.

Main Methods:

• Retrospective review of prospectively gathered data from 5954 patients (1982-1996).
• Stroke defined by persistent neurological deficit, often confirmed by CT imaging.
• Multivariable logistic regression used to identify independent predictors.

Main Results:

• Stroke incidence decreased from 3.8% (1982-1986) to 2.6% (1992-1996).
• Independent predictors: endocarditis, age >74, earlier operation period, urgent timing, concomitant coronary bypass, and reoperation.
• Increasing prevalence of older patients, urgent procedures, and bypass surgery noted in later years.

Conclusions:

• Stroke incidence during valvular surgery has declined over time.
• Despite increased risk factors, improved management or surgical techniques may explain the decrease.
• Major stroke causes identified: atherosclerotic emboli, shock, and septic emboli.