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Clinical reasoning and prevention of cardiovascular disease
Sniderman Allan1, Michael Pencina2, George Thanassoulis1
1Mike and Valeria Rosenbloom Centre for Cardiovascular Prevention, Department of Medicine, McGill University Health Centre, Montreal, Quebec.
Insights
Current cardiovascular disease prevention guidelines rely on 10-year risk and LDL cholesterol (LDL-C) for statin therapy. This viewpoint advocates for a shift from a risk-based to a causal benefit model for improved patient outcomes.
Area of Science:
- Cardiology
- Preventive Medicine
- Clinical Reasoning
Background:
- Major lipid prevention guidelines utilize 10-year cardiovascular event risk and LDL cholesterol (LDL-C) for initiating and monitoring statin therapy.
- These established principles are supported by extensive observational studies and randomized clinical trials, representing significant advancements in cardiovascular disease prevention.
- However, potential limitations in the current risk-based model necessitate re-evaluation for enhanced cardiovascular prevention strategies.
Observation:
- The current paradigm focuses on population-level risk stratification and LDL-C reduction as primary therapeutic goals.
- Clinical reasoning, integrating diverse knowledge domains like physiology, pathology, and clinical experience, is crucial for individualized patient care.
- A single case analysis highlights the complexities and potential shortcomings of solely relying on risk scores and LDL-C targets.
Findings:
- The universal practice of linking clinical outcomes of lipid-lowering trials solely to LDL-C reduction may obscure other contributing factors.
- A shift from a 'Risk model' to a 'Causal Benefit model' is proposed for a more nuanced approach to cardiovascular prevention.
- Individualized decision-making, grounded in comprehensive clinical reasoning, is paramount for effective patient care.
Implications:
- Revising the approach to cardiovascular prevention could lead to more personalized and effective treatment strategies.
- Understanding causal benefits beyond LDL-C reduction may optimize statin therapy and other interventions.
- This perspective encourages a move towards a more holistic and case-specific approach in managing cardiovascular disease risk.
Abstract:
All the major lipid prevention guidelines agree that the 10-year risk of a cardiovascular event should be the primary method to select individuals for statin prevention of a cardiovascular event. They also all rely on LDL cholesterol (LDL-C) as the primary metric to monitor lipid lowering therapy. These two principles form the major instruments on which primary prevention of cardiovascular disease is based worldwide. Their application is based on decades of prospective observational studies and large numbers of randomized clinical trials. Their development and application are milestones in medical progress. But are there limits, which were unseen and unintended, that need to be identified and overcome so that cardiovascular prevention can improve? Based on new insights and old knowledge, this Viewpoint will apply Clinical Reasoning, the process by which we integrate all the relevant knowledge, including the knowledge we have gained from physiology, pathology, epidemiology, metabolism, experimental models of disease, and our clinical experience as well as the results of randomized clinical trials to the analysis of a single case to answer these questions. Moreover, this Viewpoint will challenge the universal practice of relating the clinical outcomes of the major successful lipid lowering trials to the decrease in LDL-C and argue that cardiovascular prevention should move from the Risk model to the Causal Benefit model. This Viewpoint will be framed around a single case because, as caregivers, we make decisions case by case and because, as caregivers, the individual is the true object of our concern.
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