Publications by authors named "A G Arystan"
Article Synopsis
- Researchers used AI to analyze echocardiogram video clips to identify patients with heart failure with preserved ejection fraction (HFpEF), a condition where heart muscle works well but has filling issues.
- The AI model was trained on nearly 6,000 cases, showing strong accuracy in distinguishing between HFpEF and non-HFpEF patients, achieving an area under the curve of 0.97 in training and 0.95 in validation.
- The AI successfully reclassified a majority of indeterminate results from existing clinical scores during testing, indicating its potential to improve heart failure diagnosis over traditional methods.
Article Synopsis
- In hypertensive patients, central hemodynamics like central blood pressure and pulse wave velocity are better indicators of cardiovascular events compared to traditional peripheral blood pressure measurements.
- A study involving 591 patients found that factors like older age, female sex, and existing cardiovascular disease significantly increased the risk of negative outcomes, with 104 cardiovascular events recorded over about four years.
- Although certain central measurements were initially linked to increased risks, they weren't strong independent predictors when controlling for other patient characteristics.
In this work, a complex experimental study of the effect of electron and proton ionizing radiation on the properties of carbon nanowalls (CNWs) is carried out using various state-of-the-art materials characterization techniques. CNW layers on quartz substrates were exposed to 5 MeV electron and 1.8 MeV proton irradiation with accumulated fluences of 7 × 10 e/cm and 10 p/cm, respectively.
View Article and Find Full Text PDFThis paper reviews current 24 h ambulatory noninvasive technologies for pulse wave analysis (PWA) providing central arterial pressure, pulse wave velocity, and augmentation index and the scientific evidence supporting their use in the clinical management of patients with arterial hypertension or at risk for cardiovascular complications.The most outstanding value of these techniques lies in the fact that they are user-friendly, mostly operator independent, and enable the evaluation of vascular function during daily-life conditions, allowing to obtain repeated measurements in different out-of-office circumstances, less artificial than those of the laboratory or doctor's office.Studies performed so far suggest that 24 h PWA may represent a potentially promising tool for evaluating vascular function, structure, and damage in daily-life conditions and promoting early screening in subjects at risk.
View Article and Find Full Text PDFThis review focused on ultrasound examination of lungs, a useful complement to transthoracic echocardiography (EchoCG), which is superior to chest X-ray in the diagnostic value. The lung acoustic window always remains open and allows obtaining high-quality images in most cases. For a cardiologist, the major points of the method application are determination of pleural effusion and lung congestion.
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