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In December 2019, a new type of coronavirus called COVID-19 was identified as an unknown cause of pneumonia in Wuhan, China. The pandemic virus was transmitted to humans from a type of seafood that could spread significantly among humans in a short time. Clinical signs of coronaviruses include fever, severe sweating, cough, pneumonia, and a weakened immune system, with acute cases leading to death. One of the most important coronavirus receptors in the host cell is the angiotensin 2 converting enzyme. It is noteworthy that the patient’s recovery process increases during the inhibition of angiotensin 2 converter enzyme. Therefore, the administration of drugs that inhibit this enzyme can be effective in recovering a patient with coronavirus. Flavonoids are one the inhibitors of the angiotensin-converting enzyme, which is abundant in fruits and vegetables. Fistula, a type of flavonoid known in nature as an antioxidant and anti-inflammatory agent in the treatment of many, can be effective in the treatment of coronavirus by inhibiting the enzyme converter angiotensin 2.

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Introduction: The present study findings aimed to investigate the effect of exercises based on the American National Academy of Sports Medicine principles (NASM) on walking kinetics in piriformis syndrome in middle-aged men.
Methods: The current research was semi-experimental and laboratory-type. The statistical sample of the present study was 30 men with piriformis syndrome. Subjects were equally and randomly placed in two intervention and control groups. The intervention group performed NASM exercises for eight weeks. Before and after the exercises, the ground reaction force variables were measured using a Bartek force plate device with a sampling rate of 1000 Hz. Kinetic data were smoothed using a fourth-order Butterworth filter with a frequency cutoff of 20 Hz. For statistical analysis, analysis of variance and paired T-test were utilized at the significance level of P < 0.05.
Results: The findings of the present study showed that the effect of time on the FxHC and FyHC components at the peak of the forces and the FyHC component at the time of reaching the peak of the ground reaction force increased in the post-test compared to the pre-test. P > 0.025;
d = 0.64 - 0.96. The effect of the time factor in the FyPO component at the peak of the ground reaction force in the post-test was less than the pre-test (P < 0.025; d = 1.64-0.96). The interaction effect of the time × group in the FxPO component at the peak of the force and the FzHC component at the time of reaching the peak of the ground reaction force had a significant difference (P < 0.048; d = 0.87-0.83).
Conclusions: The NASM exercises used in this research can have a clinical and therapeutic effect that can reduce damage to the lower limbs and improve the quality of walking in people with piriformis syndrome.

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Introduction: Imaging of the vascular system supplying the brain parenchyma is a diagnostic tool in the evaluation of stroke patients. This study aimed to compare the results of digital subtraction angiography with color Doppler ultrasound of the carotid arteries in patients with ischemic stroke.
Methods: In this cross-sectional-analytical study, the medical records of patients with ischemic stroke admitted to Imam Khomeini Hospital from July 1401 to July 1402 were reviewed to collect data. Demographic information, along with the results of color Doppler ultrasound and digital subtraction angiography of the patients, were extracted and evaluated.
Results: This study included 48 patients with ischemic stroke with a mean age of 12.8 ± 0.67 years. Hypertension was present in 68.8%, diabetes mellitus in 20.8%, and smoking in 25% of patients. Based on the results of digital subtraction angiography and color Doppler ultrasound, the most common vascular abnormality was plaque (79.2%). Vascular stenosis and occlusion were present in 91.7% of patients. Color Doppler ultrasound in examining the right and left internal carotid arteries had a sensitivity of 94.9% and 92.8%, specificity of 66.7% and 38.9%, positive predictive value of 92.1% and 70.3%, and negative predictive value of 75% and 77.8%.
Conclusions: Color Doppler vascular ultrasound demonstrated high sensitivity and specificity in detecting the presence and severity of stenosis in internal carotid arteries of ischemic stroke patients, supporting its use as a non-invasive and cost-effective method in clinical practice.