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Related Concept Videos

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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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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Updated: Apr 30, 2026

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Evaluating ejection dynamic parameters for assessing severe aortic stenosis.

Mohammad Reza Aghajankhah1, Mansour Abooee1, Hassan Moladoust2

  • 1Department of Cardiology, Healthy Heart Research Center, Heshmat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.

Caspian Journal of Internal Medicine
|April 29, 2026
PubMed
Summary
This summary is machine-generated.

Accurate diagnosis of aortic stenosis (AS) severity is crucial. This study found that aortic Doppler ejection dynamic parameters, including acceleration time (AT) and ejection time (ET), can accurately diagnose severe AS.

Keywords:
AccelerationAortic valve stenosisCardiovascular diseaseDoppler effectEchocardiography

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Area of Science:

  • Cardiology
  • Echocardiography
  • Diagnostic Imaging

Background:

  • Accurate diagnosis of aortic stenosis (AS) severity is critical for guiding treatment decisions.
  • Ejection dynamic parameters like ejection time (ET) and acceleration time (AT) are potential indicators of AS severity.

Purpose of the Study:

  • To establish cutoff values for aortic ejection dynamic parameters (ET, AT, AT/ET ratio) in patients with severe AS.
  • To evaluate the diagnostic accuracy of these parameters for identifying severe AS.

Main Methods:

  • Echocardiography was used to measure aortic valve area (AVA) and trans-aortic mean pressure gradient (MPG).
  • Doppler ultrasound assessed left ventricular outflow tract time-velocity integral (LVOT TVI) to derive ejection dynamic parameters.
  • Severe AS was defined by AVA ≤1 cm² and MPG ≥ 40 mmHg.

Main Results:

  • Acceleration time (AT) at 73 ms showed 100% sensitivity and specificity for severe AS.
  • Ejection time (ET) at 278 ms demonstrated 90% sensitivity and 100% specificity.
  • The AT/ET ratio (cutoff 0.278) achieved 96% sensitivity and 100% specificity, correlating positively with MPG and negatively with AVA.

Conclusions:

  • Aortic Doppler ejection dynamic parameters are valuable complementary indices for diagnosing severe AS.
  • These parameters offer acceptable accuracy in identifying patients with severe aortic stenosis.