scholarly journals Case Report: Intrapulmonary Arteriovenous Anastomoses in COVID-19-Related Pulmonary Vascular Changes: A New Player in the Arena?

2021 ◽  
Vol 8 ◽  
Author(s):  
Salah D. Qanadli ◽  
Ana Carolina Rocha ◽  
David C. Rotzinger
Keyword(s):  
Blood Flow ◽  
Case Report ◽  
Arteriovenous Anastomoses ◽  
Vascular Changes ◽  
Vascular Abnormality ◽  
Vascular Dilatation ◽  
Underlying Mechanisms ◽  
Increased Blood Flow

Up to now, COVID-19-related vascular changes were mainly described as thrombo-embolic events. A handful of researchers reported another type of vascular abnormality referred to as “vascular thickening” or “vascular enlargement,” without specifying whether the dilated vessels are arteries or veins nor providing a physiopathological hypothesis. Our observations indicate that the vascular dilatation occurs in the venous compartment, and underlying mechanisms might include increased blood flow due to inflammation and the activation of arteriovenous anastomoses.

Vascular changes with optical coherence tomography angiography during aura of migraine: A case report

2020 ◽  
pp. 112067211989990 ◽  
Author(s):  
Pınar Bingöl Kızıltunç ◽  
Huban Atilla
Keyword(s):  
Blood Flow ◽  
Optical Coherence Tomography ◽  
Case Report ◽  
Migraine Attack ◽  
Optical Coherence Tomography Angiography ◽  
Optic Disk ◽  
Optical Coherence ◽  
Vascular Changes ◽  
Visual Aura ◽  
Eye Pain

Purpose: To demonstrate macular and optic disk vessel changes by optical coherence tomography angiography during and after a migraine attack with aura Methods: Case report Results: A 34-year-old healthy female patient was evaluated by optical coherence tomography angiography imaging during visual aura with phosphenes in the left visual field. Optical coherence tomography angiography imaging showed diffuse narrowing of the retinal vessels, decreased radial peripapillary capillary density, and decreased superficial and deep foveal vessel density in the right eye. These changes improved 3 hours after visual aura. The patient suffered from right eye pain and right-sided headache, which are typical for migraine, after the visual aura. Conclusion: These findings indicate that blood flow during migraine attack is reduced not only in the brain but also in the eye. Eye pain in migraine patients may be due to decreased blood flow in the eye. Restoring the vascular changes 3 hours after the visual aura suggests that vascular changes may be transient during a migraine attack.

Baroreflex participation in redistribution of cardiac output at onset of exercise

1988 ◽  
Vol 64 (2) ◽  
pp. 627-634 ◽  
Author(s):  
J. R. Hales ◽  
J. Ludbrook
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Cardiac Muscle ◽  
Treadmill Exercise ◽  
Arteriovenous Anastomoses ◽  
Vascular Conductance ◽  
Conscious Animal ◽  
Vascular Beds ◽  
Increased Blood Flow ◽  
Distribution Of Cardiac Output

The distribution of cardiac output and systemic vascular conductance was measured in five rabbits. Cardiac output was measured by ascending aortic flowmetry and was partitioned according to the distribution of 15-micron radiolabeled microspheres injected into the left atrium. The rabbits were studied under four conditions: at rest and after 20 s of treadmill exercise, both before and approximately 5 min after acute barodenervation of the conscious animal. During exercise in the baroinnervated state, approximately 40% of the increased blood flow to skeletal and cardiac muscle was contributed by diversion from the splanchnic organs, kidneys, systemic arteriovenous anastomoses, and skin. This diversion of blood flow during exercise was absent after arterial barodenervation. We conclude that at the onset of exercise in rabbits the mismatch between cardiac output and the metabolic demands of skeletal and cardiac muscle is accommodated by vasoconstriction in other vascular beds. We suggest that the vasoconstriction in the splanchnic organs and skin may be caused by transient suppression of the reflex effects of arterial baroreceptor input at the onset of exercise.

Management of Platelets in a Persian Girl with the Tetralogy_Pantalogy of Fallot (Tof_Pof): A Case Report Study

2020 ◽  
Author(s):  
Bahram Alamdary Badlou
Keyword(s):  
Case Report ◽  
Ventricular Septal Defect ◽  
Atrial Septal Defect ◽  
Sleep Disorders ◽  
Social Life ◽  
Rare Case ◽  
Septal Defect ◽  
Old Persian ◽  
Underlying Mechanisms ◽  
The Relationship

We report a rare case of unrepaired Tetralogy_Pantalogy of Fallot (TOF_POF) in a 20 years old Persian girl Mrs Zeynab S., who presented with cyanotic finger tops appearance, ongoing chronic thrombolytic destruction processes, and remarkable thrombocytopenia [1,2], heart ventricular septal defect (VSD), and might atrial septal defect (ASD), anxiety, sleep disorders, nightmares, and limited social life. Additionally, the relationship between underlying mechanisms, possible treatments of the thrombocytopenia, erythrocytosis, and unrepaired cardiovascular leakages remains unknown.

Diastolic pressure and peripheral resistance during stellate ganglion stimulation

1963 ◽  
Vol 204 (1) ◽  
pp. 71-72 ◽  
Author(s):  
Edward D. Freis ◽  
Jay N. Cohn ◽  
Thomas E. Liptak ◽  
Aristide G. B. Kovach
Keyword(s):  
Heart Rate ◽  
Blood Flow ◽  
Cardiac Output ◽  
Total Peripheral Resistance ◽  
Diastolic Pressure ◽  
Stellate Ganglion ◽  
Peripheral Resistance ◽  
Resistance Vessels ◽  
Left Stellate Ganglion ◽  
Increased Blood Flow

The mechanism of the diastolic pressure elevation occurring during left stellate ganglion stimulation was investigated. The cardiac output rose considerably, the heart rate remained essentially unchanged, and the total peripheral resistance fell moderately. The diastolic rise appeared to be due to increased blood flow rather than to any active changes in resistance vessels.

Blood-flow Restriction Training for a Person With Primary Progressive Multiple Sclerosis: A Case Report

2020 ◽  
Author(s):  
Evan T Cohen ◽  
Nicole Cleffi ◽  
Marianne Ingersoll ◽  
Herb I Karpatkin
Keyword(s):  
Multiple Sclerosis ◽  
Blood Flow ◽  
Case Report ◽  
Physical Therapist ◽  
Blood Flow Restriction ◽  
Patient Specific ◽  
Primary Progressive Multiple Sclerosis ◽  
Primary Progressive ◽  
Flow Restriction ◽  
Strength Tests

Abstract Objective Blood flow restriction (BFR) training, in which an inflatable cuff partially occludes blood flow around the proximal portion of a limb, coupled with low-intensity resistance training (LIRT) has resulted in gains comparable to traditional progressive resistive exercise in healthy populations. The use of BFR with LIRT may enable people with multiple sclerosis (MS) to improve strength without an increase in fatigue. The purpose of this case report is to describe the use of a BFR/LIRT program for a person with MS. Methods (Case Description) The patient was a 54-year-old woman with a 13-year history of primary progressive MS with an Extended Disability Severity Score of 3.0 out of 10. She received a BFR/LIRT program for both lower extremities (LE) biweekly for 12 weeks. Outcomes measured at baseline and at 6 and 12 weeks included the 12-item Multiple Sclerosis Walking Scale (MSWS-12), Fatigue Severity Scale (FSS), Patient-Specific Functional Scale (PSFS) (goals: running for exercise and pleasure for 45 minutes, 100% confidence in negotiating a flight of stairs, confidently and safely drive without restriction), and 14 LE strength tests. Results The intervention was well tolerated without adverse events. After 6 weeks, the MSWS-12 score improved; however, it did not exceed minimum detectable change (MDC). FSS was unchanged. All PSFS goals improved beyond MDC, and improvements in strength exceeded MDC in 2 out of 14 tests. After 12 weeks, MSWS-12 improvements persisted and the FSS score improved, but neither exceeded MDC. The PSFS improvements persisted. There were improvements exceeding MDC for 8 out of 14 strength tests. The remaining 6 strength tests improved but did not exceed MDC. Conclusion The patient had measurable improvements following the use of a BFR/LIRT program. BFR/LIRT may be an option for strength training in people with MS; however, research is needed to determine its safety and effectiveness across the population of people with MS. Impact Traditional physical therapist interventions for people with MS have been shown to be beneficial; however, their usefulness has been limited by fatigue. A growing body of literature has demonstrated the effects of a BFR/LIRT program on strength and other measures of physical function in healthy populations and those with chronic disease. This case report adds missing information to the existing literature and suggests directions for research on the effectiveness of BFR/LIRT in people with primary progressive MS.

scholarly journals Neurological determination of death in isolated brainstem lesions: A case report to highlight the issues involved

2019 ◽  
Vol 21 (3) ◽  
pp. 269-273 ◽  
Author(s):  
Alex Manara ◽  
Panayiotis Varelas ◽  
Martin Smith
Keyword(s):  
Blood Flow ◽  
Case Report ◽  
Cerebral Circulation ◽  
Posterior Circulation ◽  
Determination Of Death ◽  
International Consensus ◽  
Brainstem Lesions ◽  
Posterior Cerebral Circulation ◽  
Isolated Brainstem

The neurological determination of death in patients with isolated brainstem lesions or by disruption of the posterior cerebral circulation is uncommon and many intensivists may never see such a case in their career. It is also the only major difference between the “whole brain” and “brain stem” formulations for the neurological determination of death. We present a case of a patient with infarction of the structures supplied by the posterior cerebral circulation in whom death was diagnosed using neurological criteria, to illustrate the issues involved. We also suggest that international consensus may be achieved if ancillary tests, such as CT angiography, are made mandatory in this situation o demonstrate loss of blood flow in the anterior cerebral circulation as well the posterior circulation.

Increased blood flow to lower limbs after plasma exchange in two patients with familial hypercholesterolemia

1982 ◽  
Vol 41 (2-3) ◽  
pp. 421-425 ◽  
Author(s):  
A. Postiglione ◽  
P. Rubba ◽  
N. Scarpato ◽  
A. Iannuzzi ◽  
M. Mancini
Keyword(s):  
Blood Flow ◽  
Plasma Exchange ◽  
Familial Hypercholesterolemia ◽  
Lower Limbs ◽  
Increased Blood Flow
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