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A. Dobutamine infusion protocol for cardiovascular stress testing. As shown, three apical and three short-axis views are acquired at baseline (B) over a 3minute period. Also, heart rate (HR) and blood pressure (BP) are collected. Next, dobutamine is infused at 10 μg/kg/min, and the three apical and three
short-axis views are repeated. At peak stress, a combination of dobutamine and atropine (At) are infused to achieve 85% of the maximum predicted heart
rate response for age, and wall motion acquisitions are repeated. At this time, gadolinium first-pass perfusion images may be acquired. On completion of
the peak stress image acquisitions, recovery images (R) are obtained prior to patient discharge. Also, if contrast was administered, late gadoliniumenhanced (LGE) images may be acquired. The total scan time for an individual with a negative stress test averages 25 minutes using this protocol. Ox,
Source: MAGNETIC RESONANCE IMAGING OF THE HEART, Hurst's The Heart, 14e
oxygen saturation; Res, respiratory rate. B. Cine magnetic resonance images of the left ventricle are displayed in three short-axis (upper row) and three
Citation:
Harrington
RA, Narula
J, EapenisZJ.
Hurst's
The
14e; 2017
Available1 at:
http://mhmedical.com/
Accessed:
May 13,3 =
long-axis (lower
row) Fuster
views. V,
The
left ventricular
myocardium
divided
into
17Heart,
segments
as identified:
= basal
anterior; 2 = basal
anteroseptum;
2017
basal inferoseptum; 4 = basal inferior; 5 = basal inferolateral; 6 = basal anterolateral; 7 = midanterior; 8 = midanteroseptum; 9 = midinferoseptum; 10 =
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© 2017 McGraw-Hill
Education. All13rights
reserved
midinferior; 11
= midinferolateral;
12 = midanterolateral;
= apical
anterior; 14 = apical septum; 15 = apical inferior; 16 = apical lateral; and 17 = apical
cap. SAX, short axis. Reproduced with permission from Rerkpattanapipat P, Hundley WG: Dobutamine stress magnetic resonance imaging.