Post-discharge survival following pre-hospital cardiopulmonary arrest due to cardiac aetiology: temporal trends and...

Area of Science:

• Cardiology
• Emergency Medicine
• Public Health

Background:

• Pre-hospital cardiopulmonary arrest (PHCA) remains a critical medical emergency with significant mortality.
• Assessing long-term survival trends post-discharge is crucial for evaluating healthcare quality.

Purpose of the Study:

• To evaluate temporal trends in survival rates for patients discharged after experiencing PHCA.
• To identify factors contributing to any observed changes in survival, including clinical management.

Main Methods:

• Utilized the Heartstart Register to identify 1659 patients discharged alive after PHCA (cardiac etiology) in Scotland (1991-2001).
• Employed Cox proportional hazards models to analyze mortality risk across different time periods (tertiles).
• Adjusted for case-mix and recorded changes in clinical management.

Main Results:

• Patients surviving PHCA in 1997-2001 showed significantly lower unadjusted and adjusted risks of all-cause and cardiac death compared to 1991-1993.
• Significant improvements in clinical management were observed, including increased use of thrombolysis, beta-blockers, ACE-inhibitors, and anti-thrombotics.
• Adjusting for management changes partially attenuated the observed survival improvements, indicating management's contribution.

Conclusions:

• Survival following PHCA has demonstrably improved over the study period, even after accounting for patient case-mix variations.
• Enhanced clinical management strategies have played a significant role in improving post-discharge survival rates.