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Antihypertensive Drugs: Action of Diuretics01:16

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Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
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Decreased renal function in hypertensive emergencies.

U Derhaschnig1, C Testori2, E Riedmueller2

  • 11] Department of Emergency Medicine, Medical University of Vienna, Vienna, Austria [2] Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria.

Journal of Human Hypertension
|January 17, 2014
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Summary
This summary is machine-generated.

Hypertensive emergencies (HE) significantly impair kidney function, indicated by elevated creatinine, BUN, and NGAL levels. Acute kidney damage is evident in HE, unlike hypertensive urgencies.

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Area of Science:

  • Nephrology
  • Cardiology
  • Emergency Medicine

Background:

  • Limited data exists on acute kidney function in hypertensive crises.
  • Hypertensive emergency (HE) may cause acute kidney damage, detectable by early biomarkers like NGAL.

Purpose of the Study:

  • To compare renal function and kidney injury biomarkers between patients with HE, hypertensive urgencies, and normotensive controls.
  • To investigate the role of neutrophil gelatinase-associated lipocalin (NGAL) as an early marker of kidney injury in HE.

Main Methods:

  • Prospective, cross-sectional study of 60 emergency department patients.
  • Measurement of creatinine, blood urea nitrogen (BUN), NGAL, and cystatin C.
  • Calculation of estimated glomerular filtration rate (eGFR).

Main Results:

  • Patients with HE showed significantly higher creatinine, BUN, cystatin C, and NGAL levels compared to urgencies or controls (P < 0.01).
  • eGFR was significantly lower in HE patients (P < 0.01).
  • NGAL levels were significantly higher in HE patients, particularly those with pulmonary edema.

Conclusions:

  • Markers of acute and chronic kidney injury are elevated in hypertensive emergencies compared to urgencies or controls.
  • These findings highlight the need for further research into acute kidney damage in HE, especially concerning pulmonary edema.