Focused bedside echocardiography in the surgical intensive care unit: comparison of 3 methods to estimate cardiac index

Mark Gunst, Kazuhide Matsushima, Jason Sperry, Vafa Ghaemmaghami, Melissa Robinson, Terence O'Keeffe, Randall Friese, Heidi Frankel
Journal of Intensive Care Medicine 2011, 26 (4): 255-60
We sought to determine which of 3 methods used to evaluate cardiac index (CI) is the most accurate using focused bedside echocardiography (ECHO). We hypothesized that the fractional shortening (FS) method would provide a more accurate estimate of CI than the left ventricular outflow tract/velocity-time integral (LVOT/VTI) or Simpson's methods. This was a prospective observational cohort study conducted in the surgical ICU of an urban level 1 trauma center utilizing all patients with a pulmonary artery catheter (PAC) in place. Three surgical intensive care unit (SICU) faculty and 3 fellows underwent focused cardiac ultrasound training. Focused ECHO exams-bedside echocardiographic assessment in trauma/critical care (BEAT)- were performed using the Sonosite portable ultrasound device (Bothall, Washington). Stroke volume (SV) measurements were prospectively obtained on all trauma/SICU patients, with a PAC in place, using FS, LVOT/VTI, and Simpson's methods. The investigators were blinded to the PAC data. From each measurement, CI was calculated and categorized as low, normal, or high, based on a normal range of 2.4 to 4.0 L/min per m(2). Each CI obtained from the PAC was similarly categorized. The association between the BEAT and PAC estimates of CI was evaluated for each method using chi-square goodness of fit. Eighty five BEAT exams were performed on consecutive SICU patients, 56% were on trauma and 44% on emergency general surgery patients. There was a statistically significant association between the CI estimate using the FS method (P = .012), but not the LVOT/VTI (P = .33) or Simpson's method (P = .74). Our data showed a significant association between the PAC estimate of CI and our estimate using the FS method. The other methods were difficult to obtain, subjective, and inaccurate. Fractional shortening was the method of choice to estimate CI for the BEAT exam performed by intensivists in SICU patients.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"