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Priority points and cardiac events while waiting for coronary bypass surgery.
N W Jackson1, M P Doogue, J M Elliott
1Department of Medicine, Christchurch School of Medicine, Christchurch, New Zealand.
Heart (British Cardiac Society)
|March 27, 1999
Summary
Patients awaiting coronary artery bypass surgery (CABG) in New Zealand experienced long wait times and frequent cardiac events. Priority scoring systems did not predict these events, highlighting a need for improved waitlist management for CABG patients.
Area of Science:
- Cardiovascular Surgery
- Health Services Research
- Public Health
Background:
- Long waiting times for coronary artery bypass surgery (CABG) are a concern in many healthcare systems.
- Assessing patient risk and prioritizing surgical access is crucial for efficient resource allocation.
- International comparisons of surgical waitlists and scoring systems can identify areas for improvement.
Purpose of the Study:
- To evaluate the risk of cardiac events in patients awaiting CABG in New Zealand.
- To compare the clinical profiles of patients referred for CABG in New Zealand versus Ontario, Canada.
- To assess the efficacy of the New Zealand priority scoring system against the Ontario urgency score for CABG.
Main Methods:
- A consecutive case series of 324 patients listed for isolated CABG at Christchurch Hospital between 1994 and 1995.
- Analysis of patient outcomes including death, myocardial infarction, and unstable angina during the waitlist period.
- Comparison of clinical characteristics and waiting times with a Canadian cohort.
Main Results:
- New Zealand patients faced significantly longer median waiting times for CABG (212 days) compared to Canadian patients (17 days).
- A high incidence of cardiac events occurred while awaiting surgery: 44% experienced events, including death (4%), myocardial infarction (6%), and unstable angina (34%).
- The New Zealand priority scoring system failed to predict cardiac events, with significant events occurring even in patients with low scores.
Conclusions:
- Extended waiting periods for CABG are linked to a high frequency of adverse cardiac events, impacting patients and healthcare systems.
- While priority scores aid international comparisons, they are insufficient for predicting clinical events during the pre-operative waiting period.
- The findings underscore the need for re-evaluation of waitlist management strategies and risk stratification for CABG patients.