Physiological significance of pre- and post-ejection left ventricular tissue velocities and relations to mitral and aortic valve closures.
Asbjørn StøylenAnnichen Søyland DaaePublished in: Clinical physiology and functional imaging (2021)
Electromechanical activation of the LV is simultaneous in septum and lateral wall, occurs before MVC, is terminated by MVC itself and is thus not isovolumic. Protodiastole is a short event of lengthening, predominantly in the septum. It may be the mechanism for valve closure and ends by AVC itself. Isovolumic relaxation occurs after this velocity spike, and is characterized by elongation of the apex, shortening of the base, thus showing a volume shift from base towards apex.
Keyphrases
- aortic valve
- aortic stenosis
- left ventricular
- transcatheter aortic valve replacement
- aortic valve replacement
- transcatheter aortic valve implantation
- mitral valve
- ejection fraction
- left atrial
- minimally invasive
- heart failure
- hypertrophic cardiomyopathy
- acute myocardial infarction
- children with cerebral palsy
- cardiac resynchronization therapy
- single molecule
- coronary artery disease
- african american
- percutaneous coronary intervention