Transient Ischemic Dilation of the Left Ventricle on SPECT: Correlation with Findings at Coronary CT Angiography

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FIGURE 1.
Prevalence of coronary artery plaques and significant stenosis. Prevalence of coronary artery plaque and significant stenosis found on cCTA in TID-positive and -negative patients in setting of both normal and pathologic myocardial perfusion on SPECT.
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FIGURE 2.
cCTA and SPECT in TID-positive/normal perfusion patient. A 54-y-old woman with exclusion of CAD at cCTA (A) and normal myocardial perfusion on SPECT imaging (B). GRst = (ECG)-gated rest study; GStr = (ECG)-gated stress study; SA = short axis.
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FIGURE 3.
cCTA and SPECT in TID-positive/pathologic perfusion patient. (A) A 68-y-old man with significant coronary artery stenosis of proximal and mid portion of left anterior descending artery (arrows). (B) SPECT imaging revealed myocardial perfusion defect in corresponding segments. GRst = (ECG)-gated rest study; GStr = (ECG)-gated stress study; SA = short axis.

TABLE 1

Baseline Patient Characteristics

Data are n, with percentages in parentheses, or mean ± SD, unless otherwise indicated.

TABLE 2

Patient Physiologic Parameters During SPECT MPI

Characteristic	All patients (n = 90)	Patients with TID (n = 30)	Patients without TID (n = 60)	P
Heart rate (stress)	128 ± 31	128 ± 28	129 ± 32	0.935
Systolic blood pressure (stress)	161 ± 29	158 ± 28	162 ± 31	0.312
Atrial fibrillation	3 (3)	2 (7)	1 (2)	0.613