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Hypertension in the intensive care unit.
Michel Slama1, Santhi Samy Modeliar
1INSERM ERI 12, Amiens, France. slama.michel@chu-amiens.fr
Current Opinion in Cardiology
|June 7, 2006
Summary
Hypertensive crises are classified by target organ damage, not just blood pressure. Prompt treatment is crucial for hypertensive emergencies, while hypertensive urgencies require careful management to avoid complications.
Area of Science:
- Cardiology
- Nephrology
- Critical Care Medicine
Background:
- Malignant hypertension poses risks of blindness and renal failure.
- Catecholamine excess and postoperative hypertension may necessitate urgent treatment.
- Hypertensive emergencies require intensive care unit management with parenteral antihypertensives and monitoring.
Purpose of the Study:
- Distinguish hypertensive urgency from emergency based on organ damage.
- Highlight the critical role of end-organ damage in classifying hypertensive crises.
- Define conditions constituting hypertensive emergencies, including aortic dissection and acute renal failure.
Main Methods:
- Review of current literature on hypertensive crises management.
- Analysis of diagnostic criteria differentiating urgency from emergency.
- Evaluation of treatment strategies for severe hypertension.
Main Results:
- Severity of hypertensive crises depends on target organ damage.
- Hypertensive emergencies necessitate immediate intervention.
- Hypertensive urgencies lack signs of organ dysfunction.
Conclusions:
- Reduce mean arterial pressure by max 20% in first hours, except for aortic dissection.
- Sudden blood pressure drops can cause ischemic injury due to autoregulation adaptation.
- Treat hypertension in acute stroke cautiously due to impaired autoregulation.