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Related Concept Videos

Clinical Trials01:16

Clinical Trials

10.9K
Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
10.9K
Clinical Trials: Overview01:11

Clinical Trials: Overview

5.1K
Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
5.1K
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

289
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
289
Mitral Valve Prolapse II: Assessment and Management01:22

Mitral Valve Prolapse II: Assessment and Management

694
IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
694
Mitral Stenosis III: Medical Management01:26

Mitral Stenosis III: Medical Management

316
Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
316
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

604
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...
604

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Related Experiment Video

Updated: Feb 17, 2026

Fully Endoscopic Mitral Valve Repair with Percutaneous Cannulation of Groin Vessels
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Clinical trials in valvular surgery: a 2018 update.

Bobby Yanagawa1, Amine Mazine, Derrick Y Tam

  • 1Division of Cardiac Surgery, St Michael's Hospital, Toronto, Ontario, Canada.

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Large-scale randomized controlled trials (RCTs) are crucial for guiding cardiac surgery decisions. Despite challenges, these trials, like those from the Cardiothoracic Surgery Network, are vital for advancing valvular heart disease treatment.

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Area of Science:

  • Cardiovascular Surgery
  • Clinical Trials
  • Evidence-Based Medicine

Background:

  • Randomized controlled trials (RCTs) represent the gold standard in medical evidence.
  • Conducting large-scale surgical trials presents unique challenges, including funding, blinding, and standardization.
  • Most cardiac surgery data comes from observational studies or small, single-center trials.

Purpose of the Study:

  • To review recent landmark randomized controlled trials (RCTs) in cardiac valvular surgery.
  • To highlight the growing importance of multicenter RCTs in guiding cardiac surgical decision-making.

Main Methods:

  • Review of recent landmark randomized controlled trials (RCTs) in cardiac valvular surgery.
  • Discussion of challenges inherent in surgical trial design and execution.
  • Highlighting contributions from platforms like the Cardiothoracic Surgery Network.

Main Results:

  • The Cardiothoracic Surgery Network has produced seminal, guideline-changing contributions.
  • Key areas of impact include functional mitral regurgitation, aortic stenosis, and atrial fibrillation.
  • These trials inform surgical approaches and neuroprotective adjuncts.

Conclusions:

  • There is sustained interest in high-quality RCTs for valvular heart disease management.
  • Multicenter RCTs are essential for advancing the evidence base in cardiac surgery.
  • Continued research is needed to overcome challenges and improve trial conduct.