Early mortality following stroke: a prospective review

Area of Science:

• Neurology
• Pathology
• Critical Care Medicine

Background:

• Early mortality analysis in stroke is crucial for identifying preventable deaths.
• Prior research often used incomplete retrospective data, limiting comparisons with pathological findings.
• This study focuses on a well-defined population to provide robust insights into early stroke mortality.

Purpose of the Study:

• To analyze the patterns and causes of early mortality within 30 days following stroke.
• To identify distinct phases and contributing factors to death in intensive care stroke unit patients.
• To establish a basis for targeted interventions to reduce preventable stroke deaths.

Main Methods:

• Prospective collection of clinical, radiological, and laboratory data from 1073 consecutive stroke patients.
• Standardized protocol for data acquisition in an intensive care stroke unit.
• Autopsy in 90 cases and CT scans in 27 cases to correlate clinical data with pathological findings.

Main Results:

• A 20% mortality rate within 30 days (212 deaths) was observed.
• Early stroke mortality exhibited a bimodal distribution: one peak in the first week and a second in weeks two and three.
• First-week deaths were primarily due to transtentorial herniation (hemorrhage within 3 days, infarction 3-6 days).
• Post-first-week deaths were dominated by immobility-related causes (pneumonia, pulmonary embolism, sepsis), peaking in the second week.
• Cardiac deaths occurred throughout the month, significantly impacting patients with minor functional deficits.

Conclusions:

• Early stroke mortality has distinct temporal patterns linked to specific causes.
• Transtentorial herniation is the main driver of early mortality in the first week post-stroke.
• Immobility-related complications and cardiac events are significant contributors to later early mortality.
• Understanding these patterns can guide clinical management and preventative strategies.