Hypertension caused by renal artery stenosis

Hypertension is a common symptom of renal artery stenosis. If not detected early and treated in a timely manner, high blood pressure caused by renal artery stenosis can cause dangerous complications, even cerebral vascular accidents that lead to death.

1. What is hypertension due to renal artery stenosis?

Renal artery stenosis is a shrinking condition of one or more arteries that transport blood to the kidneys (renal arteries). Normally, the kidneys need to be given enough blood to filter out excess waste and fluids. When the renal arteries are narrowed, it leads to a deficiency of oxygen-rich blood to the kidneys. Decreased blood flow to the kidneys increases blood pressure throughout the body (system blood pressure) and causes damage to renal mes tissues. This is a condition of high blood pressure caused by narrowing of the renal artery.

Causes of hypertension caused by renal artery stenosis are usually caused by atherosclerosis, arteriosclerosis, Fibromuscular dysplasia fibromyalosclerosis, thrombophlebitis that causes artery obstruction, aneurysm of the aortic/renal artery separation, Takayasu arteritis, cardiovascular disease, renal artery stenosis after kidney transplantation or after radiotherapy,…

Blood pressure measurement

Causes of hypertension caused by renal artery stenosis usually caused by atherosclerosis

2. Dangerous complications of the disease

Hypertension caused by renal artery stenosis has the properties of: Hypertension, difficulty controlling or untenable by medical treatment; on-the-go in people under 30 years of age; severe hypertension and difficulty controlling after the age of 55; impaired renal function; symptoms of coronary artery stenosis; progressive heart failure of unknown causes.

Hypertension caused by renal artery stenosis if not detected early and treated in a timely manner can lead to dangerous complications such as malignant hypertension, boutal hypertension, sudden and difficult to control, leading to a stroke of the cerebral vessels. In addition, patients with renal artery stenosis are also at increased risk for complications of renal atrophy, progressive renal failure. Patients who progress to end-stage renal failure, have cycle dialysis with a mortality rate of up to 30% and an average survival time of only 27 months.

Treatment of hypertension

High blood pressure caused by renal artery stenosis if not detected early and treated promptly can lead to dangerous complications

3. Diagnosis of hypertension due to renal artery stenosis

3.1 Diagnosis based on clinical symptoms

Common manifestations in patients with renal artery stenosis are hypertension and impaired renal function. Symptoms of impaired renal function include: Increased or decreased urine compared to normal, drowsiness or fatigue, edema in the legs, itching or numbness, dry skin, weight loss, headache, loss of appetite, nausea and vomiting, difficulty sleeping, difficulty focusing, or cramping.

3.2 Ultrasound

In imaging methods, ultrasound is a widely used method for evaluatiy renal ermation and in collaboration with other imaging techniques for functional evaluation, is an isthority radioactivity. Ultrasound provides information on the condition of the renal artery is narrow or not (normal size is > 1.5cm).

B-mode color doppler ultrasound is capable of erm, flow velocity measurement and color spectrum, which helps to assess the degree of narrowing of the renal artery quite accurately. The sensitivity and specificity of this method is approximately 98%.

3.3 Computer ctecting

Computer-circular scans are indented immediately after ultrasound to assess erm, renal function, provide information about renal perfusentity and help determine whether the renal artery is narrow.

Commmient cirr topectry uses only intravenous photoetholytic drugs. Drugs with high iodine levels are released through the renal artery, which clearly images 3D blood vessels. This is a modern, highly accurate imaging method, without anethortic penetration of arteries through catheters, thereby avoiding complications caused by poking, and at the same time diagnosing other coordinated diseases of the kidneys.

The sensitivity and specificity of commancedident scans in the evaluation of renal artery stenosis is about 98% and 94%.

3.4 Imaging of the word resonance imaging

The resymable is a non-intrusive imaging technique that helps to assess the erleyular shape of the kidneys and information about the erm of renal function. This method can measure renal volume accurately and can see directly vascular damage, measure flow flow, assess the level of GFR dialysis and the rate of renal perfusentity. Resymable aneurysm (MRA) can assess renal artery stenosis, aneurysm, renal vascular malformation.

However, the resymable an anethortic only evaluates the renal artery between 3 – 3.5cm of the root, which is difficult to assess at a longer distance. The sensitivity of the resonance imaging since the diagnosis of renal artery stenosis is 90-100% for the near segment, 82% for the distant segment and only 0% in the kidneys. The specificity of this imaging method is 90%.

3.5 Convention anesthorym

Conventional arteriography (CA) is a method of evaluatiy the determination of renal perfusion, applied for re-examination after ultrasound, CT scan, MRI of the renal artery.

Modern MRI 3.0 Tesla resonance imaging system at Share99 Hai Phong Health Hub

Resonance resonance is a non-intrusive imaging technique that evaluates renal erley and information about the hygiene of renal function

4. Treatment of hypertension caused by renal artery stenosis

Hypertension is a symptom of renal artery stenosis, so to treat this condition, it is necessary to thoroughly treat the narrowing of the renal artery. The goal of the treatments is to improve blood pressure and prevent complications in the kidneys. Commonly used methods include:

  • Lifestyle changes: Exercise regularly, choose clean foods, should quit smoking, alcohol to protect the kidneys and the whole body;
  • Medical treatment: Use blood pressure control drugs, angiotensin transfer enzyme inhibitors, angiotensin receptor blockers, weeds, beta blockers, calci channel blockers,… as prescribed by the doctor;
  • Placement of vascular intervention stents: As the beginning of minimal intervention, otherwise the effect will turn to surgery. With this method, the doctor will use a metal mesh (stent) inside the renal vessel. After the stent is finished, the blood flow of the kidneys and the condition of high blood pressure will improve;
  • Surgery: In addition to renal artery stenosis in combination with abdominal aortic aneurysm, renal aneurysm, blockage or rupture of the renal artery, multiple peripheral stenosis, minor narrowing of the renal artery due to angina, unsuccessful angioplasty. There are 3 surgical methods used: Bypass bypass surgery to bridge the narrowed renal artery, renal vascular reconstruction surgery and renal remand surgery.

Hypertension caused by renal artery stenosis is preventable if detected early and actively treats diseases that cause renal artery stenosis and have a diet and mode order. When there are warning symptoms, patients should go to the doctor immediately for timely treatment, avoiding the risk of dangerous complications.

To register for examination and treatment at Share99 International Health Hub, you can contact Share99 Health System nationwide, or register online HERE.

SEE MORE:

  • Risk factors for renal artery stenosis
  • Should interventions be made to treat renal artery stenosis?
  • How does renal artery intervention work?

SEE MORE:

  • Risk factors for renal artery stenosis
  • How does renal artery intervention work?
  • Common cardiovascular diseases in the elderly

About: Minh Quynh

b1ffdb54307529964874ff53a5c5de33?s=90&d=identicon&r=gI am the author of Share99.net. I had been working in Vinmec International General Hospital for over 10 years. I dedicate my passion on every post in this site.

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