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Related Concept Videos

Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
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Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
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Aortic Regurgitation III: Medical Management01:25

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Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
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Aortic Regurgitation IV: Nursing Management01:17

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A nurse managing a patient with aortic regurgitation begins with a comprehensive assessment, including a review of the patient's medical history, family history, and lifestyle factors. During the cardiac examination, the nurse listens for heart sounds and checks for signs of valve abnormalities. The nurse also observes for symptoms such as dyspnea, orthopnea, and paroxysmal nocturnal dyspnea and assesses the patient's endurance and daily activity tolerance.Based on the findings, the nurse...
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Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

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Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Related Experiment Video

Updated: Feb 10, 2026

Quantitative Analysis and Characterization of Atherosclerotic Lesions in the Murine Aortic Sinus
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Amlodipine improves aortic dysfunction in atherosclerotic mice.

Sophia Marie Rasch1, Benedikt Fels2, Alexandra Schmalohr1

  • 1Institute of Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Germany.

Biomedicine & Pharmacotherapy = Biomedecine & Pharmacotherapie
|February 8, 2026
PubMed
Summary

Amlodipine (AMLO) treatment improved vascular function in atherosclerosis by normalizing pulse wave velocity and cortical stiffness. This effect was independent of atherosclerosis development and suggests a nitric oxide (NO)-dependent mechanism.

Keywords:
AAV-PCSK9(DY) mouse modelAtherosclerosisCalcium channel blockersamlodipineatomic force microscopycortical stiffnessendothelial dysfunctionpulse wave velocity

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Area of Science:

  • Cardiovascular Research
  • Pharmacology
  • Vascular Biology

Background:

  • Calcium channel blockers are used for hypertension and arrhythmias.
  • Amlodipine (AMLO) has potential anti-atherosclerotic effects, but its impact on vascular function requires further investigation.
  • Existing studies often focus on histological and biochemical markers, lacking functional assessments.

Purpose of the Study:

  • To test the hypothesis that amlodipine improves vascular function in atherosclerosis.
  • To assess the effects of amlodipine on pulse wave velocity (PWV) and cortical stiffness in an atherosclerosis mouse model.
  • To explore the mechanism underlying amlodipine's vascular effects.

Main Methods:

  • Atherosclerosis was induced in C57BL/6N mice using PCSK9(DY) injection and a Western diet (WD).
  • Mice were treated with amlodipine (AMLO) or vehicle (VEH).
  • Vascular function was assessed via in vivo pulse wave velocity (PWV) measurement and ex vivo/in vitro cortical stiffness determination.

Main Results:

  • Amlodipine treatment reduced plaque burden, calcification, and increased nitric oxide (NO) levels in atherosclerotic mice.
  • AMLO normalized elevated PWV and cortical stiffness in atherosclerotic mice.
  • AMLO also improved vascular function and glycocalyx height in non-atherosclerotic control mice, indicating an atherosclerosis-independent effect.

Conclusions:

  • Amlodipine (AMLO) effectively improves vascular function in atherosclerosis by normalizing pulse wave velocity and cortical stiffness.
  • The beneficial effects of AMLO on vascular function are independent of atherosclerosis development.
  • The mechanism of action appears to be nitric oxide (NO)-dependent.