Use of systolic time ratio and B-type naturetic peptide to predict mortality in patients with heart failure

Zewail, Aly; Broom, Cindy; Eastwood, Catherine; Scroggins, Nancy; Kar, Biswajit; Wadia, Yasmin; Delgado, Reynolds M.

doi:10.1016/s1071-9164(03)00199-4

Cited by 7 publications

(2 citation statements)

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“…In a second retrospective chart review of 64 patients (18), changes in impedance variables were related to changes in NYHA functional class, corridor walk distance, visual analog score, and quality of life over 6 months. In a third study of 98 men seen in an emergency department (19), a combination of brain natriuretic peptide and ICG variables was reported to identify patients at risk of death and hospitalization, but the independent contribution of ICG measurements was not assessed (20). Until the present report, no study had prospectively evaluated the ability of ICG to predict clinical events.…”

Section: Discussionmentioning

confidence: 93%

Utility of Impedance Cardiography for the Identification of Short-Term Risk of Clinical Decompensation in Stable Patients With Chronic Heart Failure

Packer

Abraham

Mehra

et al. 2006

Journal of the American College of Cardiology

178

101

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Section: Discussionmentioning

confidence: 93%

Utility of Impedance Cardiography for the Identification of Short-Term Risk of Clinical Decompensation in Stable Patients With Chronic Heart Failure

Packer

Abraham

Mehra

et al. 2006

Journal of the American College of Cardiology

178

101

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“…31,32 In previous studies, ICG hemodynamic parameters have shown diagnostic value in determination of cardiac vs. noncardiac causes of emergent dyspnea, 33 profiling of emergent HF vs. non-HF, 34 and determination of systolic dysfunction vs. preserved systolic function. 35,36 Prognostic value has been shown in advanced HF in profiling survivors vs. nonsurvivors 37 and in association with need for hospitalization. 38 ICG has demonstrated value in therapeutic management with pacemaker optimization, 39 β blocker titration, 40 and in documenting hemodynamic stability and improvement with intravenous nesiritide administration.…”

Section: Discussionmentioning

confidence: 99%

Association of Impedance Cardiography Parameters With Changes in Functional and Quality‐of‐Life Measures in Patients With Chronic Heart Failure

Vijayaraghavan

Crum

Cherukuri

et al. 2004

Congestive Heart Failure

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Assessment and prognosis of chronic heart failure is often difficult due to a lack of objective and easily obtainable parameters that accurately reflect disease status. This study was conducted to determine whether impedance cardiography (ICG) parameters were associated with changes in functional and quality-of-life measures in chronic heart failure patients. Retrospective chart review identified 64 patients (73% male, aged 73+/-13 years) with paired ICG measurements followed for 180+113 days. Outcome measures were changes in New York Heart Association class, 6-minute walk distance, patient visual analog scale score, and Minnesota Living with Heart Failure Questionnaire score. Measures of ICG, heart rate and blood pressure, left ventricular ejection fraction, and B-type natriuretic peptide levels were assessed for their association with outcome measures. From baseline to final evaluation, there were significant changes (p<0.05) in New York Heart Association class (from 3.2+/-0.5 to 3.0+/-0.6), 6-minute walk distance (from 668+/-380 m to 874+/-390 m), patient visual analog scale score (from 49+/-10 to 64+/-20), Minnesota Living with Heart Failure Questionnaire score (from 54+/-22 to 39+/-22), and ICG parameters of stroke index (from 38+/-9 to 41+/-8), left ventricular ejection time (from 273+/-42 to 291+/-33), and systolic time ratio (from 0.56+/-0.2 to 0.52+/-0.2). Changes in multivariate ICG parameters were significantly correlated to changes in New York Heart Association class (R, 0.80), 6-minute walk distance (R, 0.94), patient visual analog scale score (R, 0.69), and Minnesota Living with Heart Failure Questionnaire score (R, 0.67). ICG provides objective data that reflects changes in chronic heart failure disease status and treatment effectiveness.

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Impedance cardiography: More questions than answers

Wang¹,

Gottlieb

2006

Curr Cardiol Rep

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Thoracic electrical bioimpedance, also known as impedance cardiography (ICG), is a noninvasive method to obtain hemodynamic measurements, including cardiac output. Recently, there has been a flurry of reports on the clinical use of ICG. Authors have suggested that ICG measurements are useful for a myriad of situations, including diagnosis of heart failure, monitoring of a patient's clinical status, and assisting in medicine titration decisions. However, data continue to suggest poor correlation between current generation ICG devices and invasive measurements of cardiac output, especially in heart failure patients. ICG is also not able to accurately measure left ventricular filling pressures. There are limited data demonstrating any improved outcomes using ICG in the clinical setting. Given the available data, ICG use should be limited to the research setting.

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Use of systolic time ratio and B-type naturetic peptide to predict mortality in patients with heart failure

Cited by 7 publications

References 0 publications

Utility of Impedance Cardiography for the Identification of Short-Term Risk of Clinical Decompensation in Stable Patients With Chronic Heart Failure

Utility of Impedance Cardiography for the Identification of Short-Term Risk of Clinical Decompensation in Stable Patients With Chronic Heart Failure

Association of Impedance Cardiography Parameters With Changes in Functional and Quality‐of‐Life Measures in Patients With Chronic Heart Failure

Impedance cardiography: More questions than answers

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