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The current study investigated the relationships between attention, word processing, and visual field asymmetries. There is a discussion on whether each brain hemisphere possesses its own attentional resources and on how attention allocation depends on hemispheric lateralization of functions. We used stimuli with lateralized processing in an attentional task presented across the two visual hemifields. Three experiments investigated the visual search for a prespecified letter in displays containing words or nonwords, placed left and right to fixation, with a variable target letter position within the strings. In Experiment 1, two letter strings of the same type (words or nonwords) were presented to both visual hemifields. In Experiment 2, there was only one letter string presented right or left to fixation. In Experiment 3, two letter strings of different type were presented to both hemifields. Response times and accuracy data were collected. The results of Experiment 1 provide evidence for letter-by-letter search within a word in the left visual field (LVF), within a nonword in the right visual field (RVF), and for position-independent access to letters within a nonword in LVF and within a word in RVF. Experiment 3 produced similar results except for letter-by-letter search within words in RVF. In Experiment 2, for all types of letter strings in both hemifields, we observed the same letter-by-letter search. These results demonstrate that presence of stimuli in both one or two hemifields and the readiness to process a certain string type might contribute to the search for a letter within a letter string.Pulmonary arterio-venous fistula is an uncommon cause of cyanosis and should be suspected when normal cardiac examination is associated without evidence of intra-cardiac shunt. Diagnosis of extra-cardiac shunt can be suspected by contrast echocardiography using agitated saline and confirmation of pulmonary arterio-venous fistula can be made by computed tomography pulmonary angiography with information regarding the size feeding vessels necessary for the planning of intervention. With the advancement of trans-catheter devices, fistula can be occluded successfully by embolotherapy. Coils, duct occluders, and vascular plugs are some of the commonly used trans-catheter devices among the armamentarium. Each device has its own inherent advantages and limitations. However, operators' familiarity and expertise is an important parameter to choose the device to be employed in closure of fistula. The experience of Amplatzer family of devices in closure of pulmonary arterio-venous fistula is limited in the literature. We report a case of large pulmonary arterio-venous fistula successfully closed with a 20 mm Amplatzer septal occluder device in a 16-year-old cyanotic boy. Post-procedure contrast echocardiography confirmed absence of right to left shunt and computed tomography pulmonary angiography confirmed the device in situ closing the feeding vessel. Over a follow-up of six months reversal of clubbing and cyanosis was noted. .The patient was a 19-year-old woman who had experienced headache for 1 year. Soon after birth, ventricular septal defects were diagnosed, the size of which were small, therefore not requiring surgical repair. She also noticed hypertension, with up to 184/110 mmHg of blood pressure. Her physical examination revealed a difference in blood pressure between her upper and lower limbs (160/108 and 92/65 mmHg, respectively). A cardiac computed tomography image clearly demonstrated the narrowing of the aortic isthmus. Coarctation of the aorta (CoA) was definitively diagnosed and was the cause of the upper limb hypertension and headache. Cardiac catheterization revealed 3.8 mm of the aortic isthmus and 65 mmHg of the peak-to-peak pressure gradient across the CoA. The patient was offered endovascular therapy of the CoA. A non-covered stent implantation was successfully performed and the pressure gradient across the aortic isthmus disappeared. Her upper limb hypertension also improved. Aortic angioscopy revealed a yellow plaque on the aortic intima, located proximal to the coarctation site, which was exposed owing to high blood pressure. Our case highlights that an atherosclerotic change can develop even in young patients with hypertension. .Primary cardiac lymphoma (PCL) involves the heart and pericardium. Symptoms may vary according to the cardiac site involved. The most frequent cardiac manifestations associated with PCL are pericardial effusion, heart failure, and atrioventricular block. PCL can be diagnosed using transesophageal echocardiography, computed tomography (CT), or magnetic resonance imaging. We herein discuss a 67-year-old male patient who presented with sick sinus syndrome. CT demonstrated a tumor in the right atrium obstructing the superior vena cava. The patient underwent a diagnostic lateral thoracotomy with concomitant epicardial pacemaker insertion. Histological examination revealed a diffuse large B cell lymphoma, and chemotherapy, including rituximab, was begun. A diagnostic thoracotomy is crucial for a definitive diagnosis of PCL, and the most effective treatment is chemotherapy. .The incidence of acute complications is high in patients presenting late with acute myocardial infarction (AMI). We describe the case of a patient who presented late with anterior AMI that was complicated by left ventricular (LV) thrombus and electrical storm (ES). https://www.selleckchem.com/products/GDC-0449.html Temporary right ventricular pacing suppressed ES under extracorporeal membrane oxygenation support but reduced cardiac function. Immediately after returning to sinus rhythm (i.e. increase in cardiac function), free-floating LV thrombus was detected by echocardiography, resulting in cerebral embolism. Rapid improvement in cardiac function related to mechanical hemodynamic support may become a trigger for embolization in patients with LV thrombus. .An 85-year-old man was admitted to the emergency department with chest pain. His electrocardiogram showed a right bundle branch block as well as increased voltages suggesting left ventricular hypertrophy and t-wave inversions consistent with a strain pattern (versus ischemia). He underwent echocardiography which showed regional noncompaction and associated hypokinesis. These findings led to coronary angiography which revealed multiple coronary-cameral fistulae involving all three coronary arteries. He was initially treated for acute coronary syndrome but after his diagnostic procedures this was narrowed to a beta blocker, to reduce myocardial oxygen demand, and an angiotensin-converting enzyme inhibitor due to the cardiomyopathy. Although the fistulae may have caused the patient's chest pain, intervention was not possible due to the diffuse nature of the fistulae. He did well in follow-up without the development of heart failure symptoms or continued angina. .
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