Imperial Hospital de Caridade

Clinical data comparing intravascular imaging (IVI)-guided percutaneous coronary intervention (PCI) with angiography-guided PCI for chronic total occlusions (CTOs) are limited. This study aimed to compare clinical outcomes of IVI-guided versus angiography-guided PCI in patients with CTOs. A systematic review and meta-analysis were conducted to identify randomized controlled trials (RCTs) comparing IVI-guided with angiography-guided PCI in CTO populations. The primary endpoint was the incidence of major adverse cardiac events (MACE), a composite of death/cardiac death, myocardial infarction (MI), and target-vessel revascularization (TVR). Secondary outcomes included the individual components of MACE. A prespecified subgroup analysis was performed for intravascular ultrasound (IVUS) and optical coherence tomography (OCT). Five RCTs, including 1,296 patients, were analyzed, with 713 (55%) undergoing IVI-guided PCI. Over 1 to 3 years, MACE was significantly lower in the IVI-guided PCI group (7.2% vs 13%; relative risk [RR] 0.55; 95% confidence interval [CI] 0.35 to 0.88; p = 0.012; I² = 31%). In the secondary analysis, TVR incidence was lower in the IVI group (3.1% vs 6.7%; RR 0.52; 95% CI 0.29 to 0.97; p = 0.038). No statistical differences were observed for MI or death/cardiac death. In the IVUS subgroup, MACE was also lower in the IVI-guided PCI group (8.4% vs 14.3%; RR 0.59; 95% CI 0.37 to 0.91; p = 0.019). A trial sequential analysis suggested a low likelihood of type I error. In conclusion, IVI-guided PCI is associated with improved clinical outcomes compared with angiography-guided PCI for the treatment of CTOs.

This study aimed to assess whether a driving pressure-limiting strategy based on positive end-expiratory pressure (PEEP) titration according to best respiratory system compliance and tidal volume adjustment increases the number of ventilator-free days within 28 days in patients with moderate to severe acute respiratory distress syndrome (ARDS).

This is a multi-centre, randomised trial, enrolling adults with moderate to severe ARDS secondary to community-acquired pneumonia. Patients were randomised to a driving pressure-limiting strategy or low PEEP strategy based on a PEEP:FiO₂ table. All patients received volume assist-control mode until day 3 or when considered ready for spontaneous modes of ventilation. The primary outcome was ventilator-free days within 28 days. Secondary outcomes were in-hospital and intensive care unit mortality at 90 days.

The trial was stopped because of recruitment fatigue after 214 patients were randomised. In total, 198 patients (n=96 intervention group, n=102 control group) were available for analysis (median age 63 yr, [interquartile range 47-73 yr]; 36% were women). The mean difference in driving pressure up to day 3 between the intervention and control groups was -0.7 cm H₂O (95% confidence interval -1.4 to -0.1 cm H₂O). Mean ventilator-free days were 6 (sd 9) in the driving pressure-limiting strategy group and 7 (9) in the control group (proportional odds ratio 0.72, 95% confidence interval 0.39-1.32; P=0.28). There were no significant differences regarding secondary outcomes.

In patients with moderate to severe ARDS secondary to community-acquired pneumonia, a driving pressure-limiting strategy did not increase the number of ventilator-free days compared with a standard low PEEP strategy within 28 days.

NCT04972318.

Chronic total occlusion (CTO) percutaneous coronary intervention is a complex procedure and is associated with considerable risk of complications. Several success and complication scores have been developed; however, data regarding their external validation in other populations such as Latin America are scarce. This study aimed to evaluate the accuracy of the main predictors of success and complications in a broad cohort of procedures in the Latin American (LATAM) CTO registry. From April 2008 to December 2023, 3,706 consecutive procedures listed in the LATAM CTO registry were screened. Of these, 2,835 procedures had sufficient information to analyze the Multicenter CTO Registry in Japan (J-CTO); Prospective Global Registry for the Study of Chronic Total Occlusion Intervention (PROGRESS); Ostial location, Rentrop grade, and Age (ORA); Clinical and Lesion-related Score (CL-score); and EuroCTO Score (CASTLE) success scores. The complication scores were PROGRESS (MACE, mortality, and pericardiocentesis) and Outcomes, Patient health status, and Efficiency iN Chronic Total Occlusion hybrid procedures (OPEN-CTO),OPEN-CLEAN. The J-CTO and CASTLE scores demonstrated the highest areas under the curve (AUC) of 0.718 and 0.703, respectively. The AUC value for the CL-score was 0.685, whereas the PROGRESS score had an AUC of 0.598 and the ORA AUC was 0.545. The level of agreement between scores was low; only 4% of the procedures were classified as difficult or very difficult by all scores and <1% were classified as easy by all 5 scores. Of the complication scores, PROGRESS mortality (AUC 0.651) and PROGRESS MACE (AUC 0.588) showed the best performance, identifying groups with >10% event rate. These results may improve the selection of revascularization techniques, especially for patient demographics that are historically underrepresented in CTO research.