Abbreviations 2CH: Two-chamber 4CH: Four-chamber ANOVA: Analysis of variance bpm: Beats per minute cpm: Cycles per minute CINE: As in cinema CMR: Cardiovascular magnetic resonance CoV: Coefficient of variance ECG: Electrocardiography EDV: End-diastolic volume EF: Ejection fraction ESV: End-systolic volume
FID: Free induction decay FLASH: Fast Low Angle Shot LV: Left ventricle LVM: Left ventricle mass MR: Magnetic resonance MRI: Magnetic resonance imaging MS: Multistack PND: Postnatal day SAX: Short axes orientations [s.sub.D]: Slice thickness SD: Standard deviation SNR: Signal-to-noise ratio SV: Stroke volume [T.sub.ACQ]: Total acquisition time TE: Echo time TR: Repetition time.
Patients with the CRT device turned on also had significantly improved left ventricular function, as reflected in their ejection fraction and end-diastolic and end-systolic volumes
. (See box.) All these outcomes combined suggest that reverse ventricular remodeling had occurred, added Dr.
LVEF, left ventricular ejection fraction; LVEDP, left ventricular end-diastolic pressure; LVEDVI, left ventricular end-diastolic volume index; LVESVI, left ventricular end-systolic volume
index; PAP mean, mean pulmonary arterial pressure; PAP diast., end-diastolic pulmonary arterial pressure.
The reduction of end-systolic volume
by less than 10% after CRT allowed for the prediction of all-cause death during the 1.9 years of follow-up, with a sensitivity of 70% and a specificity of 70%, said Dr.
Left ventricular ejection fraction was lower (33.0 [+ or -] 4.2% vs 36.7 [+ or -] 4.9%, p=0.003) and end-systolic volume
was higher (84.1 [+ or -] 24.9 ml vs 74.6 [+ or -] 22.0 ml, p=0.012) in patients with RBBB.
Left ventricular end-systolic diameter and end-systolic volume
increased following the surgery only in patients with large-sized prosthetic valves.
As regurgitation, particularly severe regurgitation, becomes chronic, the left ventricular end-diastolic volume increases and the end-systolic volume
returns to normal (1).
Left ventricular end-systolic volume
, LV end-diastolic volume, and EF were determined from apical two- and four-chamber view using the Simpson's biplane formula, according to the suggestions of the American Society of Echocardiography (10).
Also, the absolute decreases in LV end-systolic volumes
and end-diastolic volumes at 18 months in the WJMSC group were significantly greater than those in the placebo group.