Assessment of left and right atrial 3D hemodynamics in patients with atrial fibrillation: a 4D flow MRI study

2016 ◽  
Vol 32 (5) ◽  
pp. 807-815 ◽  
Author(s):  
Michael Markl ◽  
Maria Carr ◽  
Jason Ng ◽  
Daniel C. Lee ◽  
Kelly Jarvis ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Right Atrial ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri ◽  
Left And Right ◽  
Mri Study

scholarly journals Quantifying right atrial filling and emptying: A 4D-flow MRI study

2017 ◽  
Vol 45 (4) ◽  
pp. spcone-spcone
Author(s):  
Fraser M. Callaghan ◽  
Clare Arnott ◽  
Gemma A. Figtree ◽  
Shelby Kutty ◽  
David S. Celermajer ◽  
...  
Keyword(s):  
Right Atrial ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri ◽  
Mri Study

Quantifying right atrial filling and emptying: A 4D-flow MRI study

2016 ◽  
Vol 45 (4) ◽  
pp. 1046-1054 ◽  
Author(s):  
Fraser M. Callaghan ◽  
Clare Arnott ◽  
Gemma A. Figtree ◽  
Shelby Kutty ◽  
David S. Celermajer ◽  
...  
Keyword(s):  
Right Atrial ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri ◽  
Mri Study

scholarly journals B-PO04-077 HEART RATE VARIABILITY AND LEFT ATRIAL HEMODYNAMICS IN ATRIAL FIBRILLATION MEASURED WITH 4D FLOW MRI

Heart Rhythm ◽  
2021 ◽  
Vol 18 (8) ◽  
pp. S310
Author(s):  
Amanda DiCarlo ◽  
Justin Baraboo ◽  
Mitchell A. Collins ◽  
Maurice Pradella ◽  
Patrick M. McCarthy ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Left Atrial ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri

Sildenafil Administration Improves Right Ventricular Function on 4D Flow MRI in Young Adults Born Premature

2021 ◽  
Author(s):  
Philip A Corrado ◽  
Gregory P Barton ◽  
Christopher J François ◽  
Oliver Wieben ◽  
Kara N Goss
Keyword(s):  
Heart Rate ◽  
Young Adults ◽  
Kinetic Energy ◽  
Right Ventricular ◽  
Right Atrial ◽  
4D Flow Mri ◽  
4D Flow ◽  
Direct Flow ◽  
Flow Mri ◽  
Rv Function

Background: Extreme preterm birth conveys an elevated risk of heart failure by young adulthood. Smaller biventricular chamber size, diastolic dysfunction, and pulmonary hypertension may contribute to reduced ventricular-vascular coupling. However, how hemodynamic manipulations may affect right ventricular (RV) function and coupling remains unknown. Methods: As a pilot study, 4D flow MRI was used to assess the effect of afterload reduction and heart rate reduction on cardiac hemodynamics and function. Young adults born premature were administered sildenafil (a pulmonary vasodilator) and metoprolol (a beta blocker) on separate days, and MRI with 4D flow completed before and after each drug administration. Endpoints include cardiac index (CI), direct flow fractions, and ventricular kinetic energy including E/A wave kinetic energy ratio. Results: Sildenafil resulted in a median CI increase of 0.24 L/min/m2 (P=0.02), mediated through both an increase in heart rate (HR) and stroke volume. Although RV ejection fraction improved only modestly, there was a significant increase (4% of end diastolic volume) in RV direct flow fraction (P=0.04), consistent with hemodynamic improvement. Metoprolol administration resulted in a 5-bpm median decrease in HR (P=0.01), a 0.37 L/min/m2 median decrease in CI (P=0.04), and a reduction in time-averaged kinetic energy (KE) in both ventricles (P<0.01), despite increased RV diastolic E/A KE ratio (P=0.04). Conclusions: Despite reduced right atrial workload, metoprolol significantly depressed overall cardiac systolic function. Sildenafil, however, increased CI and improved RV function, as quantified by the direct flow fraction. The preterm heart appears dependent on HR, but sensitive to RV afterload manipulations.

scholarly journals LA velocities and stasis assessed by 4D flow MRI are closely associated with LAA peak velocities by Doppler TEE in patients with atrial fibrillation

2016 ◽  
Vol 18 (S1) ◽  
Author(s):  
Michael Mark ◽  
Nicholas Furiasse ◽  
Daniel C Lee ◽  
Jason Ng ◽  
James C Carr ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri

Perioperative Hemodynamic Changes in the Thoracic Aorta in Patients With Aortic Valve Stenosis: A Prospective Serial 4D-Flow MRI Study

2020 ◽  
Vol 32 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Hiroki Kamada ◽  
Hideki Ota ◽  
Masanori Nakamura ◽  
Yohsuke Imai ◽  
Shunichi Ishida ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Thoracic Aorta ◽  
Aortic Valve Stenosis ◽  
4D Flow Mri ◽  
Hemodynamic Changes ◽  
4D Flow ◽  
Flow Mri ◽  
Mri Study

scholarly journals Complex 3D blood flow pathways in two cases of aorta to right heart fistulae: a 4D flow MRI study

2013 ◽  
Vol 31 (8) ◽  
pp. 1453-1455 ◽  
Author(s):  
Darshit Thakrar ◽  
Andrada Popescu ◽  
Suraj Gupta ◽  
Andrew de Freitas ◽  
Hyde Russell ◽  
...  
Keyword(s):  
Blood Flow ◽  
4D Flow Mri ◽  
4D Flow ◽  
Right Heart ◽  
Flow Mri ◽  
Flow Pathways ◽  
Mri Study

scholarly journals 4D flow MRI demonstrates altered aortic hemodynamics in patients with right-left and right-noncoronary bicuspid aortic valve fusion patterns

2013 ◽  
Vol 15 (S1) ◽  
Author(s):  
Riti J Mahadevia ◽  
Susanne Schnell ◽  
Pegah Entezari ◽  
Daniel Rinewalt ◽  
Preeti Kansal ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Bicuspid Aortic Valve ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri ◽  
Left And Right ◽  
Aortic Hemodynamics

Detailed Quantification of Right Atrial Function Using 4D-flow MRI

2016 ◽  
Vol 25 ◽  
pp. S224-S225
Author(s):  
F. Callaghan ◽  
C. Arnott ◽  
G. Figtree ◽  
D. Celermajer ◽  
S. Grieve
Keyword(s):  
Atrial Function ◽  
Right Atrial ◽  
4D Flow Mri ◽  
4D Flow ◽  
Flow Mri ◽  
Right Atrial Function
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