RESUMEN
BACKGROUND: High/intermediate-risk pulmonary embolism (PE) confers increased risk of cardiovascular morbidity and mortality. International guidelines recommend the formation of a PE response team (PERT) for PE management because of the complexity of risk stratification and emerging treatment options. However, there are currently no available Australian data regarding outcomes of PE managed through a PERT. AIMS: To analyse the clinical and outcome data of patients from an Australian centre with high/intermediate-risk PE requiring PERT-guided management. METHODS: We performed a retrospective observational study of 75 consecutive patients with high/intermediate-risk PE who had PERT involvement, between August 2018 and July 2021. We recorded clinical and interventional data at the time of PERT and assessed patient outcomes up to 30 days from PERT initiation. We used unpaired t tests to compare right to left ventricular (RV/LV) ratios by computed tomography criteria or transthoracic echocardiogram (TTE) at baseline and after interventions. RESULTS: Data were available for 74 patients. Initial computed tomography pulmonary angiography RV/LV ratio was increased at 1.65 ± 0.5 and decreased to 1.30 ± 0.29 following PERT-guided interventions (P < 0.001). TTE RV/LV ratio also decreased following PERT-guided management (1.09 ± 0.19 vs 0.93 ± 0.17; P < 0.001). 20% of patients had any bleeding complication, but two-thirds were mild, not requiring intervention. All-cause mortality was 6.8%, and all occurred within the first 7 days of admission. CONCLUSION: The PERT model is feasible in a large Australian centre in managing complex and time-critical PE. Our data demonstrate outcomes comparable with existing published international PERT data. However, successful implementation at other Australian institutions may require adequate centre-specific resource availability and the presence of multispeciality input.
RESUMEN
OBJECTIVE: To evaluate the role of levosimendan in improving cardiac performance and the success rate of weaning from mechanical ventilation in ventilatordependent, difficult-to-wean patients with impaired cardiac function in the intensive care unit. DESIGN AND SETTING: Prospective, observational study in the ICU of Westmead Hospital, a university-affiliated tertiary referral hospital in Sydney, NSW, between January 2003 and October 2004. PATIENTS AND INTERVENTIONS: 47 ICU patients who were ventilator-dependent for > or =10 days and had failed a weaning or extubation attempt due to respiratory insufficiency were identified as difficult to wean from mechanical ventilation. All were assessed by transthoracic or transoesophageal echocardiography. Twelve who had impaired left ventricular performance (demonstrated by left ventricular ejection fraction [LVEF] <40%) and were already established on diuretic and vasodilator treatment were given a 24-hour infusion of levosimendan. LVEF was measured again within 24 hours after infusion, and weaning from mechanical ventilation and extubation were re-attempted, when clinically deemed feasible. RESULTS: Levosimendan administration was associated with significantly improved LVEF (28.3% before v 34.6% after, P=0.04) and PaO2/FIO2 ratio (179mmHg v 197mmHg, P=0.002) and reduced FIO2 (0.45 v 0.39, P=0.01). These changes were associated with significant improvement in the success rate in weaning from mechanical ventilation (P=0.02), with seven of the 12 patients successfully weaned after levosimendan therapy, and six surviving to hospital discharge. There was no significant difference in any other important parameter between pre- and post-levosimendan weaning attempts. CONCLUSIONS: Levosimendan may provide significant benefit to ventilator-dependent patients with impaired left ventricular function. Randomised controlled trials appear justified.
