Weitere Artikel dieser Ausgabe durch Wischen aufrufen
Yang Faridah Abdul Aziz, Ganiga Srinivasaiah Sridhar, Christian Hamilton-Craig and David Platts have contributed equally to this work.
This study aims to investigate the measurement of left ventricular flow propagation velocity, V p, using phase contrast magnetic resonance imaging and to assess the discrepancies resulting from inflow jet direction and individual left ventricular size. Three V p measuring techniques, namely non-adaptive (NA), adaptive positions (AP) and adaptive vectors (AV) method, were suggested and compared. We performed the comparison on nine healthy volunteers and nine post-infarct patients at four measurement positions, respectively, at one-third, one-half, two-thirds and the conventional 4 cm distances from the mitral valve leaflet into the left ventricle. We found that the V p measurement was affected by both the inflow jet direction and measurement positions. Both NA and AP methods overestimated V p, especially in dilated left ventricles, while the AV method showed the strongest correlation with the isovolumic relaxation myocardial strain rate (r = 0.53, p < 0.05). Using the AV method, notable difference in mean V p was also observed between healthy volunteers and post-infarct patients at positions of: one-half (81 ± 31 vs. 58 ± 25 cm/s), two-thirds (89 ± 32 vs. 45 ± 15 cm/s) and 4 cm (98 ± 23 vs. 47 ± 13 cm/s) distances. The use of AV method and measurement position at one-half distance was found to be the most suitable method for assessing diastolic dysfunction given varying left ventricular sizes and inflow jet directions.
Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten
Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:
Ching SM et al (2014) Determinants of left ventricular hypertrophy among elderly hypertensive in Malaysia. Asia Life Sci 23(1):1–9
D’cruz IA, Sharaf IS (1991) Patterns of flow within the dilated cardiomyopathy left ventricle: color flow doppler observations. Echocardiography 8(2):227–231 CrossRef
Kempny A et al (2012) Quantification of biventricular myocardial function using cardiac magnetic resonance feature tracking, endocardial border delineation and echocardiographic speckle tracking in patients with repaired tetralogy of fallot and healthy controls. J Cardiovasc Magn Reson 14(1):1–14 CrossRef
Kowallick JT et al (2014) Quantification of left atrial strain and strain rate using cardiovascular magnetic resonance myocardial feature tracking: a feasibility study. J Cardiovasc Magn Reson 16(1):1–9 CrossRef
Long Q et al (2008) Subject-specific computational simulation of left ventricular flow based on magnetic resonance imaging. Proc Inst Mech Eng [H] 222(4):475–485 CrossRef
Mooi CS et al (2012) Prevalence of left ventricular diastolic dysfunction among hypertensive adults in Klang Valley, Malaysia. Life Sci J 9(3):713–719
- Left ventricular flow propagation velocity measurement: Is it cast in stone?
Bee Ting Chan
Hak Koon Yeoh
Yih Miin Liew
Yang Faridah Abdul Aziz
Ganiga Srinivasaiah Sridhar
- Springer Berlin Heidelberg
Neuer Inhalt/© ITandMEDIA