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Condition: Hypertension
Procedure: Perfusion
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Total 203 results found since Jan 2013.
Right ventricular myocardial energetic model for evaluating right heart function in pulmonary arterial hypertension
ConclusionRight ventricular total power output can be accurately estimated directly from pulmonary hemodynamics and right coronary perfusion during PAH. This model highlights the increased vulnerability of PAH patients with compromised right coronary flow coupled with high afterload.
Source: Physiological Reports - May 18, 2022 Category: Physiology Authors: Jacqueline V. Scott,
Tanuf U. Tembulkar,
Meng ‐Lin Lee,
Bradley T. Faliks,
Kelly L. Koch,
Anton Vonk‐Nordegraaf,
Keith E. Cook Tags: ORIGINAL ARTICLE Source Type: research
Older adults with higher blood pressure variability exhibit cerebrovascular reactivity deficits
CONCLUSIONS: Findings add to prior work linking blood pressure variability and cerebrovascular disease burden and suggest blood pressure variability may also be related to prodromal markers of cerebrovascular dysfunction and disease, with potential therapeutic implications.PMID:36149821 | DOI:10.1093/ajh/hpac108
Source: American Journal of Hypertension - September 23, 2022 Category: Cardiology Authors: Isabel J Sible Jung Yun Jang Shubir Dutt Belinda Yew John Paul M Alitin Yanrong Li Anna E Blanken Jean K Ho Anisa J Marshall Arunima Kapoor Fatemah Shenasa Aim ée Gaubert Amy Nguyen Virginia E Sturm Mara Mather Kathleen E Rodgers Xingfeng Shao Danny J Wa Source Type: research
Hypertensive Emergencies of Pregnancy
Hypertension is commonly encountered in pregnancy and has both maternal and fetal effects. Acute hypertensive crisis most commonly occurs in severe preeclampsia and is associated with maternal stroke, cardiopulmonary decompensation, fetal decompensation due to decreased uterine perfusion, abruption, and stillbirth. Immediate stabilization of the mother including the use of intervenous antihypertensives is required and often delivery is indicated. With appropriate management, maternal and fetal outcomes can be excellent.
Source: Obstetrics and Gynecology Clinics - March 1, 2013 Category: OBGYN Authors: James M. Alexander, Karen L. Wilson Source Type: research
Holohemispheric developmental venous anomaly
Developmental venous anomalies (DVA) are normally diminutive and incidental.1,2 In this 33-year-old patient with epilepsy, the DVA is holohemispheric. Her epilepsy probably originates from the left side based on semiology; the EEG displayed left-sided slowing. Axial T1-weighted sequences show skull atrophy, ventricular widening, and satellite cavernous malformations with accumulation of subacute blood products including hemosiderin (figure, A and B). T2 gradient echo illustrates pockets of chronic hemorrhage (figure, C and D). Engorged holohemispheric anomalous venous structures channel into ventricular periependymal veins...
Source: Neurology - April 29, 2013 Category: Neurology Authors: Jung, A. K., Henson, J. W., Susanto, D., Caylor, L. M., Doherty, M. J. Tags: MRI, Other cerebrovascular disease/ Stroke, All Epilepsy/Seizures NEUROIMAGES Source Type: research
HIMALAIA (Hypertension Induction in the Management of AneurysmaL subArachnoid haemorrhage with secondary IschaemiA): a randomized single‐blind controlled trial of induced hypertension vs. no induced hypertension in the treatment of delayed cerebral ischemia after subarachnoid hemorrhage
This article describes the design of the HIMALAIA trial (Hypertension Induction in the Management of AneurysmaL subArachnoid haemorrhage with secondary IschaemiA), designed to assess the effectiveness of induced hypertension on neurological outcome in patients with DCI after SAH.
AimsTo investigate whether induced hypertension improves the functional outcome in patients with delayed cerebral ischemia after SAH.
DesignThe HIMALAIA trial is a multicenter, singe‐blinded, randomized controlled trial in patients with DCI after a recent SAH. Eligible patients will be randomized to either induced hypertension (n = 120) or t...
Source: International Journal of Stroke - May 22, 2013 Category: Neurology Authors: C. S. Gathier, W. M. Bergh, A. J. C. Slooter, Tags: Protocols Source Type: research
Autoregulation of Cerebral Blood Flow is Preserved in Primary Intracerebral Hemorrhage Brief Reports
Conclusions—
CBF remained stable after acute BP reduction, suggesting some preservation of cerebral autoregulation.
Source: Stroke - May 24, 2013 Category: Neurology Authors: Gould, B., McCourt, R., Asdaghi, N., Dowlatshahi, D., Jeerakathil, T., Kate, M., Coutts, S. B., Hill, M. D., Demchuk, A. M., Shuaib, A., Emery, D., Butcher, K., on behalf of the ICH ADAPT investigators Tags: Acute Cerebral Hemorrhage, Brain Circulation and Metabolism Brief Reports Source Type: research
Teaching NeuroImages: Perfusion imaging of cerebral hyperperfusion syndrome following revascularization
A 69-year-old man developed acute-onset confusion and hypertension with systolic pressures in the 160s 1 day after carotid endarterectomy for right facial droop from left hemispheric lacunar infarcts. CT perfusion (figure, A–D) demonstrated findings consistent with cerebral hyperperfusion syndrome (CHS) following revascularization. CHS is caused by loss of autoregulation, hypertension, and ischemia-reperfusion injury resulting in increased regional blood flow and vascular congestion.1 CHS following revascularization may present as ipsilateral headache, focal seizure, or neurologic deficit. Nonperfusion imaging may sh...
Source: Neurology - July 22, 2013 Category: Neurology Authors: Kalra, V. B., Rao, B., Malhotra, A. Tags: CT, All Cerebrovascular disease/Stroke RESIDENT AND FELLOW SECTION Source Type: research
Time-Varying Modeling of Cerebral Hemodynamics
The scientific and clinical importance of cerebral hemodynamics has generated considerable interest in their quantitative understanding via computational modeling. In particular, two aspects of cerebral hemodynamics, cerebral flow autoregulation (CFA) and CO$_{2}$ vasomotor reactivity (CVR), have attracted much attention because they are implicated in many important clinical conditions and pathologies (orthostatic intolerance, syncope, hypertension, stroke, vascular dementia, mild cognitive impairment, Alzheimer's disease, and other neurodegenerative diseases with cerebrovascular components). Both CFA and CVR are dy...
Source: IEEE Transactions on Biomedical Engineering - February 18, 2014 Category: Biomedical Engineering Source Type: research
Cerebral Perfusion Change of Venous Hypertension on Near-Infrared Spectroscopy Signals after Operation for Dural Arteriovenous Fistula
We report 1 case of dural AVF with retrograde leptomeningeal venous drainage. Cerebral hemodynamics were monitored using near-infrared spectroscopy imaging before, during, and after the 2-stage operative treatment. Preoperative functional near-infrared spectroscopy (fNIRS) showed an increase in deoxyhemoglobin (HbR) during a motor task. After partial coil embolization of the shunt points (stage 1), HbR increased during the first half of the task and decreased later, whereas oxyhemoglobin (HbO2) decreased in the first half of the task and increased later. After complete embolization (stage 2), fNIRS showed a pattern similar...
Source: Journal of Stroke and Cerebrovascular Diseases - August 19, 2013 Category: Neurology Authors: Satoka Shidoh, Takenori Akiyama, Takayuki Ohira, Kazunari Yoshida Tags: Original Articles Source Type: research
Unfavorable outcome of aggressive lowering of high blood pressure. Case report.
Abstract
Cerebral autoregulation is essential in the maintenance of cerebral blood flow. Due to this autoregulation, cerebral perfusion is constant in healthy subjects if blood pressure values are between 50-150 mmHg. In hypertensive patients the curve is right-shifted towards higher blood pressure values (pathological autoregulation). Aggressive blood pressure reduction can lead to severe ischaemia. The authors report the history of a 73-year-old man with the background history of widespread atherosclerotic disease. The patient complained about headache and dizziness and was found to have high blood pressure (160...
Source: Orvosi Hetilap - October 1, 2014 Category: Journals (General) Authors: Kuperczkó D, Csécsei P, Komáromy H, Szapáry L, Fehér G Tags: Orv Hetil Source Type: research
Spinal dural arteriovenous fistula with intramedullary cord hemorrhage: Diagnostic challenges
We present a man with a SDAVF and associated intramedullary cord hemorrhage.
Source: Nature Clinical Practice - December 8, 2014 Category: Neurology Authors: Schmidt, K. A., Huang, J. F., Black, D. F., Kaufmann, T. J., Lanzino, G., Kumar, N. Tags: MRI, All Clinical Neurology, All Cerebrovascular disease/Stroke, Spinal cord tumor, All Spinal Cord Cases Source Type: research
Effectiveness of Diagnostic Strategies in Suspected Delayed Cerebral Ischemia: A Decision Analysis Clinical Sciences
Conclusions—
Imaging studies to test for the presence of angiographic vasospasm or perfusion deficits in patients with clinical DCI do not seem helpful in selecting which patients should undergo treatment and may not improve outcomes. Future directions include validating these results in prospective cohort studies.
Source: Stroke - December 22, 2014 Category: Neurology Authors: Rawal, S., Barnett, C., John-Baptiste, A., Thein, H.-H., Krings, T., Rinkel, G. J. E. Tags: Cerebral Aneurysm, AVM, & Subarachnoid hemorrhage, Angiography, Computerized tomography and Magnetic Resonance Imaging Clinical Sciences Source Type: research
Hemodynamic monitoring during liver transplantation: A state of the art review.
Authors: Rudnick MR, Marchi LD, Plotkin JS
Abstract
Orthotopic liver transplantation can be marked by significant hemodynamic instability requiring the use of a variety of hemodynamic monitors to aide in intraoperative management. Invasive blood pressure monitoring is essential, but the accuracy of peripheral readings in comparison to central measurements has been questioned. When discrepancies exist, central mean arterial pressure, usually measured at the femoral artery, is considered more indicative of adequate perfusion than those measured peripherally. The traditional pulmonary artery catheter is less frequentl...
Source: World Journal of Hepatology - June 10, 2015 Category: Gastroenterology Tags: World J Hepatol Source Type: research
P-016 role of balloon guiding catheter in mechanical thrombectomy using stentretrivers subgroup analysis of swift prime
ConclusionBGC use in the SWIFT PRIME cohort of patients treated with rTPA and mechanical thrombectomy with Solitaire demonstrated significantly lower infarct size and higher reperfusion rates at 27 h. Overall procedure times were shorter for BGC group. These findings suggest that there is likely benefit from use of BGC when treating AIS with mechanical thrombectomy; however, randomized trials are required to confirm this finding.Abstract P-016 Table 1Distribution of variables among BGC and no BGC group Characteristic No BGC BGC Total p-value Number394887Age (years)61.8 ± 13.566.8 ± 11.764.6 ± 12....
Source: Journal of NeuroInterventional Surgery - July 26, 2015 Category: Neurosurgery Authors: Pereira, V., Siddiqui, A., Jovin, T., Yavagal, D., Levy, E., Bonafe, A., Cognard, C., Jansen, O., Nogueira, R., Jahan, R., Slater, L., Coutinho, J., Saver, J., Goyal, M. Tags: SNIS 12th Annual Meeting Oral Poster Abstracts Source Type: research
