Trufisp CineASD not easily seen Contrast Bolus First Pass Exam ASD is easily seen Contrast Bolus First Pass Exam ASD is easily seen Trufisp Cine ASD not easily seen Qp/Qs: Atrial Septal
Trang 1Flow Imaging
Clinical Cases
Trang 2Typical Velocities (cm/sec)
Pulmonary Artery 70-130
External Iliac Artery 81 – 120
Common Femoral Artery 115
Superficial Femoral Artery 90
Sagittal Sinus Vein 10
Peripheral Veins 5 – 10
Trang 3Trufisp Cine
ASD not easily seen
Contrast Bolus
First Pass Exam
ASD is easily seen
Contrast Bolus First Pass Exam
ASD is easily seen
Trufisp Cine
ASD not easily seen
Qp/Qs: Atrial Septal Defect
Dr John Lesser and Dr M Tadavarthy, Abbott Northwestern Hospital, Minneapolis, MN
Trang 4Flow Imaging is Perpendicular to Main Pulmonary Artery VENC = 150 cm/sec
Flow Imaging is Perpendicular to Aorta VENC = 150 cm/sec
Qp/Qs: Atrial Septal Defect
Trang 5aorta pulmonary artery
Qp/Qs: Atrial Septal Defect
Trang 6pulmonary artery
stroke volume
130 ml
net flow
130 ml net flow80 ml
Qp/Qs: Atrial Septal Defect
ascending aorta stroke volume
80 ml
Trang 7pulmonary artery ascending aorta
• shunt fraction (Qp/Qs ratio) = 131 / 82 = 1.6
• shunt from left atrium to right atrium
• known as systemic to pulmonary shunt
Qp/Qs: Atrial Septal Defect
Trang 8Pulmonary Outflow Short Axis
Pressure Gradient: Pulmonary Valve Stenotic Jet
Dr John Lesser and Dr M Tadavarthy, Abbott Northwestern Hospital, Minneapolis, MN
Trang 91 Truefisp Cine image through pulmonary valve shows the jet.
2 Rephased Flow image with in-plane VENC 500 cm/sec shows the valve.
3 Phase Flow image with in-plane VENC 500 cm/sec shows the jet.
1
Pressure Gradient: Pulmonary Valve Stenotic Jet
Trang 104 Orthogonal slice was placed directly through the jet.
5 Truefisp Cine image through pulmonary valve shows the valve & jet.
6 Phase Flow image with in-plane VENC 500 cm/sec shows the jet
4
Pressure Gradient: Pulmonary Valve Stenotic Jet
Trang 11• Flow Imaging of Stenotic Jet with Inplane VENC 400 cm/sec
• Agrees with Peak Velocity of 400 cm/sec Measured at Cardiac Catheterization
Trang 12Flow Imaging with Through-plane VENC
of 150 cm/sec has
aliasing (must raise VENC)
Regurgitant Fraction: Aortic Valve Insufficiency
Dr John Lesser and Dr M Tadavarthy, Abbott Northwestern Hospital, Minneapolis, MN
TrueFisp Cine Imaging
of Aortic Valve
Trang 13VENC -150 to +150 cm/sec has aliasing (before VENC Adjustment, peak velocity 144 wrong)
Regurgitant Fraction: Aortic Valve Insufficiency
Trang 14VENC –130 to +170 cm/sec has NO aliasing (after VENC Adjustment, peak velocity 167 correct)
Regurgitant Fraction: Aortic Valve Insufficiency
Trang 15regurgitant fraction = 25 / 101 = 25%
stroke volume = 76 ml
Regurgitant Fraction: Aortic Valve Insufficiency