Journal of cardiothoracic and vascular anesthesia · 2001
Myocardial lactate production is not involved in the ischemic preconditioning mechanism in coronary artery bypass graft surgery patients.
Клиническое исследованиеСтатьяРандомизированное исследованиеПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Wu Z K, Pehkonen E, Laurikka J, Kaukinen L, Honkonen E L, Kaukinen S, Tarkka M R
Аннотация
OBJECTIVE: To study the relationship between ischemic preconditioning (IP) and lactate production and their impact on coronary artery bypass graft surgery patients.
DESIGN: Prospective, randomized, controlled study.
SETTING: University hospital.
PARTICIPANTS: Eighty 3-vessel disease coronary artery bypass graft surgery patients with stable and unstable angina pectoris.
INTERVENTIONS: The IP patients were preconditioned with 2 periods of 2-minute ischemia followed by 3-minute reperfusion before aortic cross-clamping.
MEASUREMENTS AND MAIN RESULTS: The cardiac index (CI) after surgery was significantly higher in the IP group than in controls among stable patients (p = 0.013). IP was not effective in CI recovery in unstable patients. The baseline values of lactate production were 11.6%, 20.3%, -7.0%, and -2.9% in stable IP, stable control, unstable IP, and unstable control patients. Compared with baseline, lactate production increased significantly after the IP protocol (39.0% and 47.5% in the stable and unstable patients), and operation (47.5%, 31.7%, 35.4%, and 35.6% in stable IP, stable control, unstable IP, and unstable control patients) but not after 10 minutes of cardiopulmonary bypass (29.7% and 19.0% in the stable and unstable patients). There were no differences among the groups in lactate production after the operation. Lactate production after the IP protocol was negatively associated with CI recovery after surgery in the IP patients (p = 0.026).
CONCLUSION: The IP effects do not include modulation of lactate production. IP induces lactate production, but it seems not to be involved in the triggering process.
DESIGN: Prospective, randomized, controlled study.
SETTING: University hospital.
PARTICIPANTS: Eighty 3-vessel disease coronary artery bypass graft surgery patients with stable and unstable angina pectoris.
INTERVENTIONS: The IP patients were preconditioned with 2 periods of 2-minute ischemia followed by 3-minute reperfusion before aortic cross-clamping.
MEASUREMENTS AND MAIN RESULTS: The cardiac index (CI) after surgery was significantly higher in the IP group than in controls among stable patients (p = 0.013). IP was not effective in CI recovery in unstable patients. The baseline values of lactate production were 11.6%, 20.3%, -7.0%, and -2.9% in stable IP, stable control, unstable IP, and unstable control patients. Compared with baseline, lactate production increased significantly after the IP protocol (39.0% and 47.5% in the stable and unstable patients), and operation (47.5%, 31.7%, 35.4%, and 35.6% in stable IP, stable control, unstable IP, and unstable control patients) but not after 10 minutes of cardiopulmonary bypass (29.7% and 19.0% in the stable and unstable patients). There were no differences among the groups in lactate production after the operation. Lactate production after the IP protocol was negatively associated with CI recovery after surgery in the IP patients (p = 0.026).
CONCLUSION: The IP effects do not include modulation of lactate production. IP induces lactate production, but it seems not to be involved in the triggering process.