Probe alignment is a particularly important consideration for M-mode echocardiography, as the perpendicularity of the short axis plane with the ventricular walls is essential to validate the mathematical assumptions and equations used to derive fractional shortening, cardiac dimensions and LV mass parameters.
"We're going to bring those fences in another 150 feet," he said, playing off the fact that a season ago he shortened the dimensions of spacious Citi Field in a bid to help the team's power hitters.
If the extraction side is not restored in a proper time following tooth extraction, the opposing tooth is erupted, and shortening of vertical dimension for prosthetic treatment occurs [1].
Shortening the typographic dimensions of the pop-up boxes of additional information makes navigation a little less daunting.
Left ventricular function was assessed by calculating the percentage fractional shortening of the internal dimension and ejection fraction using standard formulas.
There were no significant differences between the children who received doxorubicin alone and those who received dexrazoxane and doxorubicin in terms of mean left ventricular dimension, fractional shortening or contractility, before, during or after therapy.
Ejection fraction (EF) was determined in 2D and M-mode; fractional shortening (FS) and l dimensions were measured in M-mode using a 12.5 MHz transducer (Siemens Acuson Sequoia C256).
Similarly, after pacing or sham-pacing in the wild-type and Cx43+/− mice, indexes of ventricular dimensions, fractional shortening, and wall thicknesses were unchanged when compared between groups and compared with baseline values (Table 2).
In septic patients the following parameters were obtained: left ventricular (LV) telediastolic dimensions, LV shortening fraction (LVSF), cardiac output (CO) by analysis of pulsed-wave Doppler at the LV outflow tract and inferior vena cava (IVC) evaluation (maximum and minimum dimensions and IVC index).
We found no significant differences in baseline echocardiographic characteristics including ventricular dimensions, fractional shortening, or wall thicknesses in any of the wild-type or Cx43+/− subgroups (supplemental table; all supplementary material can be found with the online version of this article).
This can be done using 1D M-mode techniques to calculate fractional shortening (left ventricular end diastolic dimension − left ventricular end systolic dimension/left ventricular end diastolic dimension) or by volumetric techniques to calculate ejection fraction (left ventricular end diastolic volume − left ventricular end systolic volume/left ventricular end diastolic volume).
