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Acad Emerg Med. 2002 Mar;9(3):186-93.

Determination of left ventricular function by emergency physician echocardiography of hypotensive patients.

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1
Department of Emergency Medicine, Carolinas Medical Center, Charlotte, NC 28232, USA.

Erratum in

  • Acad Emerg Med 2002 Jun;9(6):642.

Abstract

OBJECTIVE:

To determine whether emergency physicians (EPs) with goal-directed training can use echocardiography to accurately assess left ventricular function (LVF) in hypotensive emergency department (ED) patients.

METHODS:

Prospective, observational study at an urban teaching ED with >100,000 visits/year. Four EP investigators with prior ultrasound experience underwent focused echocardiography training. A convenience sample of 51 adult patients with symptomatic hypotension was enrolled. Exclusion criteria were a history of trauma, chest compressions, or electrocardiogram diagnostic of acute myocardial infarction. A five-view transthoracic echocardiogram was recorded by an EP investigator who estimated ejection fraction (EF) and categorized LVF as normal, depressed, or severely depressed. A blinded cardiologist reviewed all 51 studies for EF, categorization of function, and quality of the study. Twenty randomly selected studies were reviewed by a second cardiologist to determine interobserver variability.

RESULTS:

Comparison of EP vs. primary cardiologist estimate of EF yielded a Pearson's correlation coefficient R = 0.86. This compared favorably with interobserver correlation between cardiologists (R = 0.84). In categorization of LVF, the weighted agreement between EPs and the primary cardiologist was 84%, with a weighted kappa of 0.61 (p < 0.001). Echocardiographic quality was rated by the primary cardiologist as good in 33%, moderate in 43%, and poor in 22%. The EF was significantly lower in patients with a cardiac cause of hypotension vs. other patients (25 +/- 10% vs. 48 +/- 17%, p < 0.001).

CONCLUSIONS:

Emergency physicians with focused training in echocardiography can accurately determine LVF in hypotensive patients.

PMID:
11874773
[Indexed for MEDLINE]
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