Original article| Volume 21, ISSUE 4, P492-496, August 2007

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Inferior Vena Cava Diameter and Central Venous Pressure Correlation During Cardiac Surgery

Published:December 30, 2006DOI:
      Objective: The purpose of this study was to determine whether a relationship exists between the inferior vena cava diameter (IVCD) or the superior vena cava diameter (SVCD) measured at the point of entry into the right atrium using transesophageal echocardiography (TEE) and the central venous pressure (CVP) under different experimental conditions.
      Design: Prospective study.
      Setting: University hospital, single institution.
      Participants: Seventy patients undergoing elective cardiac surgery.
      Interventions: CVP, IVCD, and SVCD were measured in a 2-dimensional, long-axis midesophageal bicaval view at end-diastole with electrocardiographic synchronization. Data were recorded during suspended ventilation, before and after leg elevation, and at different levels of positive end-expiratory pressure (0, 5, and 10 cmH2O).
      Measurements and Main Results: The relationship between IVCD and CVP had 2 portions: A first (CVP ≤11 mmHg) in which the IVCD showed a strong correlation with the CVP (R = 0.801, p < 0.001; CVP = 2.009 + [0.312 * IVCD]) and a second (CVP >11 mmHg) in which the correlation was poor (R = 0.272, p = 0.065). No correlation between SVCD and CVP was observed.
      Conclusion: A strong correlation between TEE-derived IVCD measured at the point of entry into the right atrium and CVP was observed in cardiac surgical patients when CVP was ≤11 mmHg.

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      Linked Article

      • Correlation of the Inferior Vena Cava Diameter With the Central Venous Pressure
        Journal of Cardiothoracic and Vascular AnesthesiaVol. 22Issue 6
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          We read with great interest the article by Lorsomradee et al studying the inferior vena cava diameter (IVCD) and central venous pressure (CVP) correlation during cardiac surgery.1 We applaud their efforts in trying to find yet another means to determine preload in the operating room. We ourselves have been trying to elucidate the same question for the past 2 years and, in fact, presented a very similar study in 50 patients in the form of an abstract at the American Society of Anesthesiologists annual meeting in 2005.
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