What question did this study set out to answer?

To assess hemodynamic alterations and left ventricular volume changes during the rewarming period following hypothermic coronary artery bypass surgery.

December 1, 1984Critical Care Medicine

Rewarming hypovolemia after aortocoronary bypass surgery

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Why the study?

Does rewarming after aortocoronary bypass surgery alter left ventricular preload and diastolic compliance?

Key Points

To assess hemodynamic alterations and left ventricular volume changes during the rewarming period following hypothermic coronary artery bypass surgery.
Evaluated 17 patients recovering from uneventful coronary bypass surgery conducted with moderate systemic hypothermia (25°C) and cold-potassium cardioplegia.
Obtained serial hemodynamic measurements and nuclear ventriculograms during rewarming to track cardiac index, left atrial pressure, and left ventricular end-diastolic volume index before and after volume loading.
Rewarming resulted in significant decreases in both cardiac index and left ventricular end-diastolic volume index without a corresponding decrease in left atrial pressure.
Diastolic ventricular compliance decreased during rewarming, while intrinsic myocardial performance remained stable across mild hypothermia (35 ± 5°C) and normothermia.
Left atrial pressure failed to reliably reflect left ventricular preload during rewarming, necessitating volume loading to preserve filling volume and prevent hypoperfusion.

Structured PICO

Does rewarming after aortocoronary bypass surgery alter left ventricular preload and diastolic compliance?

Population

17 patients recovering from uneventful coronary bypass surgery performed with moderate systemic hypothermia (25 degrees C) and cold-potassium cardioplegia

Intervention

Rewarming and recovery (serial hemodynamic and nuclear ventriculogram measurements)

Outcome

Changes in cardiac index (CI), left atrial pressure (LAP), and left ventricular end-diastolic volume index (EDVI)surrogate

Left atrial pressure is an unreliable indicator of left ventricular preload during rewarming after coronary bypass surgery, necessitating volume loading to maintain preload and prevent hypoperfusion.

Discussion

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Implication

LAP may poorly reflect LV preload during rewarming after CABG; this cohort study leaves open the need for alternative monitoring.

Cite This Study

Ivanov et al. (1984) studied this question.

synapsesocial.com/papers/6a71efc76c240de38cdc4472 https://doi.org/10.1097/00003246-198412000-00010

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Ask AI

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Rewarming hypovolemia after aortocoronary bypass surgery

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Rewarming hypovolemia after aortocoronary bypass surgery

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Also Consider