Time-Course Reduction in Patient Exposure to Radiation From Coronary Interventional Procedures: The Greater Paris Area Percutaneous Coronary Intervention Registry.

BACKGROUND: The frequency of complex percutaneous coronary interventions (PCIs) has increased in the last few years, with a growing concern on the radiation dose received by the patients. Multicenter data from large unselected populations on patients' radiation doses during coronary angiography (CA) and PCI and temporal trends are lacking. This study sought to evaluate the temporal trends in patients' exposure to radiation from CA and PCI. METHODS AND RESULTS: Data were taken from the CARDIO-ARSIF registry that prospectively collects data on all CAs and PCIs performed in the 36 catheterization laboratories in the Greater Paris Area, the most populated regions in France with about 12 million inhabitants. Kerma area product and Fluoroscopy time from 152 684 consecutive CAs and 103 177 PCIs performed between 2009 and 2013 were analyzed. A continuous trend for a decrease in median [interquartile range] Kerma area product was observed, from 33 [19-55] Gy cm2 in 2009 to 27 [16-44] Gy cm2 in 2013 for CA (P<0.0001), and from 73 [41-125] to 55 [31-91] Gy cm2 for PCI (P<0.0001). Time-course differences in Kerma area product remained highly significant after adjustment on Fluoroscopy time, PCI procedure complexity, change of x-ray equipment, and other patient- and procedure-related covariates. CONCLUSIONS: In a large patient population, a steady temporal decrease in patient radiation exposure during CA and PCI was noted between 2009 and 2013. Kerma area product reduction was consistent in all types of procedure and was independent of patient-related factors and PCI procedure complexity.

Cyanide poisoning by fire smoke inhalation: a European expert consensus.

Smoke inhalation is a common cause of cyanide poisoning during fires, resulting in injury and even death. In many cases of smoke inhalation, cyanide has increasingly been recognized as a significant toxicant. The diagnosis of cyanide poisoning remains very difficult, and failure to recognize it may result in inadequate or inappropriate treatment. Findings suggesting cyanide toxicity include the following: (a) a history of enclosed-space fire; (b) any alteration in the level of consciousness; (c) any cardiovascular changes (particularly inexplicable hypotension); and (d) elevated plasma lactate. The feasibility and safety of empiric treatment with hydroxocobalamin for fire smoke victims have been reported in the literature. On the basis of a literature review and a panel discussion, a group of European experts has proposed emergency management protocols for cyanide toxicity in fire smoke victims.

A simple nomogram for early prediction of myocardial reperfusion after pre-hospital thrombolysis.

AIMS: To discriminate early ST-segment elevation myocardial infarction (STEMI) presenters at a high probability of successful pre-hospital thrombolysis (PHT) using a simple nomogram based on independent predictors of complete ST resolution. METHODS AND RESULTS: OPTIMAL was an observational, prospective study undertaken at 79 medical centres in France in patients with STEMI undergoing pre-hospital thrombolysis (PHT) within six hours of symptom onset and coronary angiography within six hours of thrombolysis. The baseline and pre-coronary angiography ECGs of 800 patients were analysed. The main outcome measure was ST segment resolution ≥ 70%. ST resolution was associated with a significant reduction in mortality (1.8% vs. 4.3%; p=0.05). After multivariable logistic regression analysis, five independent predictors of successful myocardial reperfusion were identified: ≤ 1 h between pain onset and thrombolysis (odds ratio [OR] 1.76, 95% confidence interval [CI] 1.18-2.62); body mass index (BMI) <30 kg/m2 (OR 1.74, CI 1.12-2.72); current/previous smoking (OR 1.71, CI 1.21-2.43); non-anterior infarct territory (OR 1.75, CI 1.27-2.41); and maximum amplitude of ST elevation <3 mm (OR 1.83, CI 1.32-2.54). The C-statistic of the model was 0.71 (95% CI 0.67-0.74). Using these five independent factors, a simple nomogram was developed to assess the probability of ST resolution after PHT. This nomogram allows discrimination of probabilities ranging from 13 to 72%. CONCLUSIONS: This simple nomogram can predict the probability of successful myocardial reperfusion after thrombolysis. This may be useful in the triage of STEMI presenters.