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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...
213
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

212
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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Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

184
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...
184
Aortic Regurgitation IV: Nursing Management01:17

Aortic Regurgitation IV: Nursing Management

166
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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Aneurysm IV: Nursing Management01:22

Aneurysm IV: Nursing Management

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Vigilant monitoring for aneurysm rupture is essential for patients undergoing aortic surgery.Preoperative Nursing ManagementContinuously monitor the patient for manifestations of aneurysm rupture, such as pallor, weakness, tachycardia, hypotension, abdominal, back, groin, or periumbilical pain, changes in consciousness, and a pulsating abdominal mass. Regularly assess the patient's peripheral pulses.Instruct the patient to consume a clear liquid diet the day before surgery and administer...
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Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

Cardiomyopathy VII: Pre and Post Operative Nursing Management

142
Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
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Related Experiment Video

Updated: Nov 26, 2025

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
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Early Hemodynamics after Aortic Valve Replacement.

Serik Aitaliyev1, Egle Rumbinaitė2, Karolina Mėlinytė-Ankudavičė2

  • 1Department of Cardiac, Thoracic and Vascular Surgery, Hospital of Lithuanian University of Health Sciences Kauno Klinikos, Medical Academy, Lithuanian University of Health Sciences, Eivenių 2, LT-50009 Kaunas, Lithuania.

Medicina (Kaunas, Lithuania)
|December 10, 2020
PubMed
Summary
This summary is machine-generated.

Stented valves offer better hemodynamic performance post-exercise than mechanical valves, with lower patient-prosthesis mismatch rates observed after exercise compared to rest.

Keywords:
AVRechocardiographyexercise testingpatient-prosthesis mismatchvalve hemodynamics

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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Prosthetic Devices

Background:

  • Aortic valve replacement (AVR) necessitates careful consideration of prosthesis type.
  • Hemodynamic performance and patient-prosthesis mismatch (PPM) are critical outcomes after AVR.
  • Understanding early hemodynamic changes is vital for optimizing patient care.

Purpose of the Study:

  • To compare hemodynamics of different aortic prostheses (stented vs. mechanical).
  • To evaluate patient-prosthesis mismatch (PPM) at rest and after exercise.
  • To assess changes in effective orifice area (EOA) and indexed EOA (iEOA) post-exercise.

Main Methods:

  • Retrospective analysis of 150 patients undergoing AVR.
  • Echocardiography to measure transprosthetic gradients, velocity, EOA, and iEOA at rest and post-exercise.
  • Six-minute walk test (6MWT) to assess exercise response.

Main Results:

  • Stented valves demonstrated superior hemodynamic performance post-exercise compared to mechanical valves.
  • Moderate PPM was observed in 9.5% at rest and 3.3% after exercise; severe PPM was absent.
  • Stented valves showed more significant changes in EOA and iEOA after exercise than mechanical valves.

Conclusions:

  • Both mechanical and stented valves exhibit favorable resting hemodynamics early post-AVR.
  • A lower rate of PPM was detected after exercise compared to rest.
  • Stented valves show improved dynamic hemodynamic response post-exercise.