PMID- 27140294
OWN - NLM
STAT- MEDLINE
DCOM- 20170323
LR  - 20181202
IS  - 1724-6040 (Electronic)
IS  - 0391-3988 (Linking)
VI  - 39
IP  - 5
DP  - 2016 Jul 4
TI  - In vitro 2D PIV measurements and related aperture areas of tricuspid 
      bioprosthetic mitral valves at the beginning of diastole.
PG  - 253-7
LID - 10.5301/ijao.5000494 [doi]
AB  - PURPOSE: Besides ventricular parameters, the design and angular orientation of a 
      prosthetic heart valve induce a specific flow field. The aim of this study was to 
      know the inflow characteristics of a left ventricular model (LVM), investigating 
      the behavior of tricuspid bioprosthetic mitral valves in terms of velocity 
      profiles and related valve aperture areas at the beginning of diastole, under 
      different conditions. METHODS: 3 heart rates (HRs) were established in the LVM 
      and each mitral bioprosthesis (27 and 31 mm diameter) was installed in 2 
      orientations, rotated by 180 degrees  . For each experimental setup, 2-dimensional 
      particle image velocimetry (2D PIV) measurements and simultaneous mitral valve 
      (MV) area detection were obtained from 50 samples. RESULTS: The results from the 
      velocity profiles immediately downstream of mitral bioprostheses showed the 
      influence of valve orientation for moderate HRs, although for a similar magnitude 
      of mean velocity vectors. The geometries of MV open areas for each HR were 
      similar regardless of valve orientation, except for the 27-mm valve at 90 beats 
      per minute (bpm), and for the 31-mm valve at 60 bpm. Moreover, for each HR, 
      similar percentages of valve open area were obtained regardless of MV nominal 
      diameters. CONCLUSIONS: In conclusion, the experimental setup for the 2D PIV 
      measurements synchronized with the MV area detection was a useful tool for 
      knowing the inflow characteristics of the LVM.
FAU - Bazan, Ovandir
AU  - Bazan O
AD  - Escola Politecnica of the University of Sao Paulo, Sao Paulo - Brazil.
FAU - Ortiz, Jayme Pinto
AU  - Ortiz JP
AD  - Escola Politecnica of the University of Sao Paulo, Sao Paulo - Brazil.
FAU - Fukumasu, Newton Kiyoshi
AU  - Fukumasu NK
AD  - Escola Politecnica of the University of Sao Paulo, Sao Paulo - Brazil.
FAU - Pacifico, Antonio Luiz
AU  - Pacifico AL
AD  - Escola Politecnica of the University of Sao Paulo, Sao Paulo - Brazil.
FAU - Yanagihara, Jurandir Itizo
AU  - Yanagihara JI
AD  - Escola Politecnica of the University of Sao Paulo, Sao Paulo - Brazil.
LA  - eng
PT  - Journal Article
DEP - 20160425
PL  - United States
TA  - Int J Artif Organs
JT  - The International journal of artificial organs
JID - 7802649
SB  - IM
MH  - *Bioprosthesis
MH  - Diastole/*physiology
MH  - *Heart Valve Prosthesis
MH  - Heart Ventricles/physiopathology
MH  - Humans
MH  - Mitral Valve/physiopathology
MH  - Models, Cardiovascular
MH  - Prosthesis Design
MH  - Rheology
MH  - Tricuspid Valve/physiopathology
EDAT- 2016/05/04 06:00
MHDA- 2017/03/24 06:00
CRDT- 2016/05/04 06:00
PHST- 2016/04/11 00:00 [accepted]
PHST- 2016/05/04 06:00 [entrez]
PHST- 2016/05/04 06:00 [pubmed]
PHST- 2017/03/24 06:00 [medline]
AID - 0EB41F80-F3B6-46DC-A216-208E84E76E5B [pii]
AID - 10.5301/ijao.5000494 [doi]
PST - ppublish
SO  - Int J Artif Organs. 2016 Jul 4;39(5):253-7. doi: 10.5301/ijao.5000494. Epub 2016 
      Apr 25.