scholarly journals Perfusion‐MRI is a Poor Indicator of Hemodynamic Compromise in Vertebrobasilar Disease in the VERiTAS Study

2020 ◽  
Author(s):  
Alfred P. See ◽  
Christopher J. Stapleton ◽  
Xinjian Du ◽  
Fady T. Charbel ◽  
Sepideh Amin‐Hanjani ◽  
...  
Keyword(s):  
Perfusion Mri ◽  
Hemodynamic Compromise ◽  
Poor Indicator

Abstract TP91: Perfusion-weighted Magnetic Resonance Imaging is a Poor Indicator of Hemodynamic Compromise in Vertebrobasilar Disease

Stroke ◽  
2019 ◽  
Vol 50 (Suppl_1) ◽  
Author(s):  
Christopher J Stapleton ◽  
Xinjian Du ◽  
Keith R Thulborn ◽  
Fady T Charbel ◽  
Sepideh Amin-Hanjani
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Hemodynamic Compromise ◽  
Poor Indicator ◽  
Weighted Magnetic Resonance Imaging

Comparison of breath-hold and free-breathing quantitative pulmonary perfusion MRI

Pneumologie ◽  
2012 ◽  
Vol 66 (06) ◽  
Author(s):  
D Maxien ◽  
M Ingrisch ◽  
F Meinel ◽  
S Thieme ◽  
MF Reiser ◽  
...  
Keyword(s):  
Free Breathing ◽  
Perfusion Mri ◽  
Breath Hold ◽  
Pulmonary Perfusion

Off-Pump Supraarterial Decompression Myotomy for Myocardial Bridging

2005 ◽  
Vol 8 (1) ◽  
pp. 49 ◽  
Author(s):  
Mersa M. Baryalei ◽  
Theodorus Tirilomis ◽  
Wolfgang Buhre ◽  
Stephan Kazmaier ◽  
Friedrich A. Schoendube ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Exercise Testing ◽  
Clinical Symptoms ◽  
Therapeutic Option ◽  
Median Sternotomy ◽  
Myocardial Bridging ◽  
Off Pump ◽  
Hemodynamic Compromise ◽  
Artery Disease ◽  
The Right

Background: Myocardial bridging of the left anterior descending (LAD) artery may result in clinical symptoms. Surgery with cardiopulmonary bypass (CPB) is a therapeutic option with considerable risk. We hypothesized that off-pump supraarterial myotomy could be an effective treatment modality. Methods: Between October 1998 and May 2000, 13 patients were referred for surgery. All were symptomatic despite medical therapy. Anteroseptal ischemia had been proven by thallium scintigraphy in all 13 patients, exercise testing was positive in 11. All patients were operated on with an off-pump approach after median sternotomy. Results: Mean patient age was 61 8 years (range, 43-71 years). Coronary artery disease mandating additional bypasses was present in 3 patients. The bypasses were done off pump in 2 patients. Conversion to on-pump surgery was necessary in 3 of 13 patients (23%) because of hemodynamic compromise (1 patient), opening of the right ventricle (1 patient), and injury to the LAD (1 patient). Supraarterial myotomy was performed in all patients. One patient who underwent surgery with CPB developed postoperative anteroseptal myocardial infarction. Postoperative exercise testing was performed in all patients and did not reveal any persistent ischemia. Mortality was 0%. All patients were free from symptoms and had not undergone repeat interventions after an average of 51 7 months of follow-up. Conclusions: Off-pump supraarterial myotomy effectively relieves coronary obstruction but has a certain periprocedural risk as evidenced by 1 myocardial infarction, 1 right ventricular injury, and 1 LAD injury. Long-term freedom from symptoms and from reintervention favor further investigation of this surgical therapy.

Erdheim-Chester Disease Presenting with Histiocytic Colitis and Cytokine Storm

2017 ◽  
Vol 26 (2) ◽  
pp. 183-187
Author(s):  
George P. Christophi ◽  
Yeshika Sharma ◽  
Quader Farhan ◽  
Umang Jain ◽  
Ted Walker ◽  
...  
Keyword(s):  
Periodic Acid ◽  
Poor Response ◽  
Rare Type ◽  
Periodic Acid Schiff ◽  
Hematopoietic Stem ◽  
Hemodynamic Compromise ◽  
Erdheim Chester Disease ◽  
Erdheim Chester ◽  
Chester Disease ◽  
Segmental Colitis

Background: Non-Langerhans histiocytosis is a group of inflammatory lymphoproliferative disorders originating from non-clonal expansion of hematopoietic stem cells into cytokine-secreting dendritic cells or macrophages. Erdheim-Chester Disease (ECD) is a rare type of non-Langerhans cell histiocytosis characterized by tissue inflammation and injury caused by macrophage infiltration and histologic findings of foamy histiocytes. Often ECD involves the skeleton, retroperitoneum and the orbits. This is the first report documenting ECD manifesting as segmental colitis and causing cytokine-release syndrome.Case presentation: A 68-year old woman presented with persistent fever without infectious etiology and hematochezia. Endoscopy showed segmental colitis and pathology revealed infiltration of large foamy histiocytes CD3-/CD20-/CD68+/CD163+/S100- consistent with ECD. The patient was empirically treated with steroids but continued to have fever and developed progressive distributive shock.Conclusion: This case report describes the differential diagnosis of infectious and immune-mediated inflammatory and rheumatologic segmental colitis. Non-Langerhans histiocytosis and ECD are rare causes of gastrointestinal inflammation. Prompt diagnosis is imperative for the appropriate treatment to prevent hemodynamic compromise due to distributive shock or gastrointestinal bleeding. Importantly, gastrointestinal ECD might exhibit poor response to steroid treatment and other potential treatments including chemotherapy, and biologic treatments targeting IL-1 and TNF-alpha signaling should be considered.Abbreviations: AFB: acid-fast bacilli; ECD: Erdheim-Chester Disease; IBD: inflammatory bowel disease; PASD: periodic acid-Schiff with diastase; TB: tuberculosis

ASL Acquisition Principles

2017 ◽  
Author(s):  
Michael Chappell ◽  
Bradley MacIntosh ◽  
Thomas Okell
Keyword(s):  
Arterial Spin Labeling ◽  
Spin Labeling ◽  
Perfusion Mri ◽  
Making Choices ◽  
Technical Details

A variety of acquisition methods for arterial spin labeling (ASL) perfusion MRI exist, often with different names referring to broadly similar approaches. This chapter outlines the main flavors of ASL in common use, along with their strengths and weaknesses, before finally presenting the current consensus of the community on good acquisition parameters for general use. The chapter considers the choice of labeling (e.g. pseudo-continuous versus pulsed), readout (e.g. 2D versus 3D), the choice of post-label delay, and a number of other solutions to correct for artifacts such as arterial contamination. Avoiding extensive technical details, this chapter seeks to inform the ASL user when making choices about acquisition parameters for the use of ASL and also provides enough terminology to help a new user understand the key parameters that they need to know when presented with a new ASL dataset.

THE MISSING PIECE OF THE PERICARDIUM WHICH PREVENTED HEMODYNAMIC COMPROMISE

2019 ◽  
Vol 73 (9) ◽  
pp. 2808
Author(s):  
Roosha Parikh ◽  
Apurva Patel ◽  
Becky Naoulou ◽  
John Puskas ◽  
Ramesh Gowda
Keyword(s):  
Hemodynamic Compromise
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