Histopathological Features of Aspirated Thrombi after Primary Percutaneous Coronary Intervention in Patients with ST-Elevation Myocardial Infarction

BACKGROUND: Plaque disruption with superimposed thrombus is the predominant mechanism responsible for the onset of acute coronary syndromes. Studies have shown that plaque disruption and thrombotic occlusion are frequently separated in time. We established the histopathological characteristics of material aspirated during primary percutaneous coronary intervention (PCI) in a large consecutive ST-elevation myocardial infarction (STEMI) population. METHODOLOGY/PRINCIPAL FINDINGS: Thrombus aspiration during primary PCI was performed in 1,362 STEMI patients. Thrombus age was classified as fresh (<1 day), lytic (1-5 days), or organized (>5 day). Further, the presence of plaque was documented. The histopathological findings were related to the clinical, angiographic, and procedural characteristics. Material could be aspirated in 1,009 patients (74%). Components of plaque were found in 395 of these patients (39%). Fresh thrombus was found in 577 of 959 patients (60%) compared to 382 patients (40%) with lytic or organized thrombi. Distal embolization was present in 21% of patients with lytic thrombus compared to 12% and 15% of patients with fresh or organized thrombus. CONCLUSIONS/SIGNIFICANCE: Material could be obtained in 74% of STEMI patients treated with thrombus aspiration during primary PCI. In 40% of patients thrombus age is older than 24 h, indicating that plaque disruption and thrombus formation occur significantly earlier than the onset of symptoms in many patients

Anxiety levels of patients undergoing coronary procedures in the catheterization laboratory

High levels of anxiety are associated with worse outcomes in coronary artery disease patients. Little is known about anxiety levels in patients undergoing coronary procedures. Our objective is to examine the levels of anxiety in patients undergoing coronary angiography (CAG) or percutaneous coronary intervention (PCI) during the different phases of hospital stay and to evaluate which patient characteristics are associated with increased anxiety. Patients undergoing CAG or PCI between April 2009 and April 2010 were included in this prospective cohort study. Anxiety levels were measured using the self reported Visual Analogue Scale (VAS) of Anxiety, ranging from 0 to 100. VAS anxiety scores were obtained at hospital intake, pre- and post-procedure, and at hospital discharge. Multivariate linear regression analyses were performed to assess correlations between baseline characteristics and anxiety levels at the different time points. In total 2604 patients were included, with 70.4% male participants with a mean age of 65±12years. VAS anxiety scores were highest pre-procedure (44.2±27.0mm). Female patients reported a significantly higher pre procedure VAS anxiety score (50.4±26.5) compared to males (41.5±26.8, p=0.02). Other factors associated with higher levels of anxiety at different time points were age <65years, low level of education and an acute primary PCI. In the largest cohort to date, we examined anxiety among patients undergoing PCI or CAG was highest immediately around the procedure, particularly in patients aged <65years, of female gender, undergoing primary PCI, or with a lower level of education. Better pre-procedural information or pharmacological strategies may reduce anxiety in these patient

Premedication to reduce anxiety in patients undergoing coronary angiography and percutaneous coronary intervention

Aims In this study, we examined the effects of the routinely administration of benzodiazepines on reducing periprocedural anxiety versus no premedication. Methods In this open label study, we enrolled 1683 patients undergoing diagnostic coronary angiograms (CAG) or percutaneous coronary interventions (PCI). Randomisation was simulated by systematically allocating patients in monthly rotational periods to lorazepam 1mg/sl, oxazepam 10mg/po, diazepam 5mg/po, midazolam 7.5mg/po or no premedication. Anxiety was measured at four different time points using the one-item Visual Analogue Scale for Anxiety (VAS score) ranging from 0 to 10. The primary outcome was the difference in anxiety reduction (VAS, preprocedure to postprocedure), between the different premedication strategies versus no premedication. Results Anxiety reduction was larger in patients premedicated with lorazepam (2.0, SE=1.6, P=0.007) or diazepam (2.0, SE=1.5, p=0.003) compared with patients without any premedication (1.4, SE=1.2). The use of midazolam or oxazepam did not lead to a significant reduction in anxiety compared with patients who did not receive premedication. Additionally, a high number of patients treated with midazolam (N=39, 19.8%) developed side effects. Conclusions In this study, the use of lorazepam or diazepam was associated with a significant, but modest anxiety reduction in patients undergoing CAG or PCI. This study does not support the standard use of oxazepam or midazolam as premedication to reduce anxiety

Clinical, angiographic and procedural characteristics of the 1,362 patients treated with thrombus aspiration during primary PCI.

<p>Continous variables are presented as means and standard deviations and categorical data are presented as frequencies (counts) and percentages.</p><p>LAD = left anterior descending coronary artery; TIMI = Thrombolysis In Myocardial Infarction; § = By visual assessment by the operator; † = Time between onset of symptoms and needle time; ‡ = According to the ACC-AHA classification.</p

Clinical, angiographic and procedural characteristics of the 959 patients with classifiable material.

<p>Continous variables are presented as means and standard deviations and categorical data are presented as frequencies (counts) and percentages.</p><p>LAD = left anterior descending coronary artery; TIMI = Thrombolysis In Myocardial Infarction; § = By visual assessment by the operator; † = Time between onset of symptoms and needle time; ‡ = According to the ACC-AHA classification.</p