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Antihypertensive therapy for the elderly: an expert system to assist therapeutic decisions
K Gondek1, P P Lamy, S M Speedie
1University of Maryland, Baltimore.
Insights
An expert system aids primary providers in tailoring hypertension treatment for elderly patients. It offers individualized therapy recommendations, considering numerous patient factors for better outcomes.
Area of Science:
- Geriatrics
- Medical Informatics
- Cardiology
Background:
- Hypertension is highly prevalent in the elderly, with isolated systolic hypertension being a significant risk factor.
- Managing hypertension in older adults is complex due to multiple comorbidities and polypharmacy.
- Individualized antihypertensive therapy is crucial for effective treatment in the elderly population.
Purpose of the Study:
- To develop and describe an expert system designed to assist primary providers in making therapeutic decisions for elderly patients with hypertension.
- To provide individualized antihypertensive therapy recommendations by considering a comprehensive set of patient-specific factors.
Main Methods:
- An expert system was developed incorporating over 200 rules.
- The system analyzes patient characteristics including age, sex, lifestyle, comorbidities, nutritional status, and prior drug responses.
- It utilizes IBM's Expert System Environment (ESE) on an IBM 4341 for implementation.
Main Results:
- The system generates individualized antihypertensive therapy recommendations.
- It incorporates factors such as co-existing diseases, multiple drug use, and previous treatment responses.
- Relative costs of different therapeutic options are also provided.
Conclusions:
- The expert system offers a valuable tool for primary providers managing hypertension in elderly patients.
- It facilitates individualized treatment plans by integrating complex patient data.
- The system is currently undergoing validation by a panel of cardiologists.
Abstract:
The prevalence of hypertension among the elderly is high. Recent multicenter studies have shown hypertension, especially isolated systolic hypertension, to be a risk factor and treatment to be effective, if individualized. In addition, the presence of multiple complicating conditions and the need for multiple medications in the elderly increases the required medical knowledge base necessary to appropriately determine antihypertensive therapy. To assist the primary provider, an expert system has been developed that provides advice on therapeutic decisions for elderly patients (greater than 65 years old and less than 85 years old). It takes into account such factors as age, sex, lifestyle, site of care, nutritional status, physiologic and pathophysiologic changes, co-existing diseases, multiple drug use, and prior antihypertensive drug exposure and response. The system user enters patient characteristics, disease states, risk factors, relevant laboratory values, and prior drug therapy. The system responds with a set of recommendations of appropriate therapy individualized for the specific patient. To further assist the process, relative costs of therapy are also included. The system, consisting of over 200 rules, is currently undergoing validation by a panel of cardiologists. It is implemented in IBM's Expert System Environment (ESE) on the IBM 4341. The authors wish to acknowledge the contribution of the ESE software by the IBM Corporation.