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Clinical presentation and functional prognosis in syndrome X
A Chauhan1, P A Mullins, S I Thuraisingham
1Regional Cardiac Unit, Papworth Hospital, Papworth Everard, Cambridge.
British Heart Journal
|October 1, 1993
Summary
Patients with Syndrome X presenting with unstable angina experience a better functional recovery and improved quality of life compared to those with stable angina. This suggests distinct underlying mechanisms influencing prognosis in Syndrome X.
Area of Science:
- Cardiology
- Internal Medicine
- Clinical Research
Background:
- Syndrome X, characterized by typical anginal chest pain, a positive exercise test, and a normal coronary angiogram, presents a diagnostic challenge.
- The functional prognosis and long-term outcomes for patients with Syndrome X based on their initial clinical presentation remain incompletely understood.
Purpose of the Study:
- To evaluate the impact of initial clinical presentation, specifically unstable versus stable angina, on the functional prognosis of patients diagnosed with Syndrome X.
- To compare the long-term functional status and quality of life between these two patient groups.
Main Methods:
- A prospective study was conducted involving 82 patients with Syndrome X, divided into two groups: 41 with unstable angina and 41 with stable angina.
- Patients were followed up for an average of 35-36 months using questionnaires to assess their functional state, symptom relief, physical activity limitations, and work capacity.
Main Results:
- Patients initially presenting with unstable angina reported significantly more pain-free periods (p = 0.008) and greater freedom in physical activity (p < 0.001) compared to the stable angina group.
- The unstable angina group also showed a lower perceived burden of heart disease (p < 0.001) and were less likely to be unable to work normally due to chest pain (p < 0.001).
- Fewer patients in the unstable angina group continued to attend outpatient clinics for chest pain (p = 0.004) or required regular antianginal medication (p < 0.001) at follow-up.
Conclusions:
- Patients with Syndrome X presenting with unstable angina demonstrate a significantly better functional prognosis compared to those with stable angina.
- These findings suggest that the clinical presentation of angina in Syndrome X may be linked to different underlying pathophysiological mechanisms, influencing long-term functional outcomes.