Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Initiation of Translation02:33

Initiation of Translation

39.2K
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
39.2K
Initiation of Translation02:33

Initiation of Translation

8.2K
8.2K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

12.2K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
12.2K
Heart Valves01:16

Heart Valves

12.3K
The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
12.3K
Center of Gravity00:58

Center of Gravity

6.8K
The center of gravity (COG) of an object is the point where the object's total weight is considered to be concentrated. Knowing the location of the center of gravity is useful when predicting the behavior of a moving object or designing static structures. In a uniform gravitational field, the center of gravity is similar to the center of mass (COM); yet, these two points can be positioned differently. For example, the Moon's center of mass lies very close to its geometric center, but...
6.8K
Center of Gravity01:15

Center of Gravity

2.2K
The center of gravity is the point at which an object's weight appears to be concentrated and can be used to balance the object perfectly. This point is essential in mechanics as it provides information regarding a body's stability and moments of inertia. The center of gravity does not always have to fall within the shape or boundaries of the body; it may also lie outside the body in certain cases.
To determine its location, the principle of moments can be utilized by dividing the object into...
2.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A novel maternal and newborn health composite indicator using national health surveys from low- and middle-income countries: Validation and association with infant mortality.

Public health·2026
Same author

The renewed role of interspinous devices: the InSpan system-a narrative review on surgical indications.

Journal of spine surgery (Hong Kong)·2026
Same author

Misconnected: Valve Failure from an Unexpected Chordal Insertion.

Portuguese journal of cardiac thoracic and vascular surgery·2026
Same author

Light-Driven Organocatalytic Birch Reduction for Late-Stage Drug Modification and sp<sup>3</sup>-Rich Spirocycle Synthesis.

Journal of the American Chemical Society·2026
Same author

Massive Floating Thrombus of the Aortic Arch: Perspectives From Multimodality Imaging.

The Canadian journal of cardiology·2025
Same author

Data Science-Driven Discovery of Optimal Conditions and a Condition-Selection Model for the Chan-Lam Coupling of Primary Sulfonamides.

ACS catalysis·2025

Related Experiment Video

Updated: Feb 11, 2026

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement
14:14

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement

Published on: December 11, 2017

14.7K

Aortic Valve Replacement With Perceval® Bioprosthesis: Initial Single-Center Experience.

Diogo Rijo1, Sara Simões Costa1, João Pedro Monteiro1

  • 1Centro Hospitalar Vila Nova de Gaia/Espinho, Portugal.

Revista Portuguesa De Cirurgia Cardio-Toracica E Vascular : Orgao Oficial Da Sociedade Portuguesa De Cirurgia Cardio-Toracica E Vascular
|April 28, 2018
PubMed
Summary

Aortic valve replacement (AVR) using the sutureless Perceval® bioprosthesis shows excellent hemodynamic results and low mortality. This minimally invasive approach simplifies procedures, especially for combined surgeries.

More Related Videos

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
12:17

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots

Published on: May 21, 2017

11.9K
Technique and Patient Selection Criteria of Right Anterior Mini-Thoracotomy for Minimal Access Aortic Valve Replacement
08:50

Technique and Patient Selection Criteria of Right Anterior Mini-Thoracotomy for Minimal Access Aortic Valve Replacement

Published on: March 26, 2018

12.3K

Related Experiment Videos

Last Updated: Feb 11, 2026

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement
14:14

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement

Published on: December 11, 2017

14.7K
Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
12:17

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots

Published on: May 21, 2017

11.9K
Technique and Patient Selection Criteria of Right Anterior Mini-Thoracotomy for Minimal Access Aortic Valve Replacement
08:50

Technique and Patient Selection Criteria of Right Anterior Mini-Thoracotomy for Minimal Access Aortic Valve Replacement

Published on: March 26, 2018

12.3K

Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Interventional Cardiology

Background:

  • Severe or symptomatic aortic valve stenosis necessitates aortic valve replacement (AVR).
  • Minimally invasive techniques offer alternatives to traditional sternotomy for AVR.
  • The sutureless Perceval® bioprosthesis has demonstrated promising outcomes in prior reports.

Purpose of the Study:

  • To evaluate the safety and efficacy of the Perceval® sutureless bioprosthesis for aortic valve replacement.
  • To assess the hemodynamic performance and clinical outcomes of AVR using the Perceval® valve.
  • To explore the feasibility of minimally invasive AVR with sutureless technology.

Main Methods:

  • A cohort of 43 patients underwent AVR with the Perceval® bioprosthesis between March 2016 and September 2017.
  • Procedures included isolated AVR and combined surgeries (CABG, mitral, tricuspid valve).
  • Both conventional and minimally invasive approaches (ministernotomy, mini-thoracotomy) were utilized.

Main Results:

  • Mean patient age was 74.3±6.8 years, with a mean EuroSCORE II of 4.1±0.6.
  • Hemodynamic performance showed significant improvement in gradients and effective orifice area post-procedure.
  • In-hospital mortality was 9.3%, with no valve-related deaths; 11.6% required pacemaker implantation.

Conclusions:

  • AVR with the Perceval® bioprosthesis is linked to low mortality and superior hemodynamic function.
  • Sutureless technology can decrease operative times, enhancing the reproducibility of minimally invasive AVR.
  • The Perceval® valve facilitates efficient and effective surgical treatment for aortic valve stenosis.