Resting Radionuclide Myocardial Perfusion Imaging in a Chest Pain Center Including an Overnight Delayed Image Acquisition Protocol

Article Figures & Data

TABLE 1

Demographics, Cardiovascular Risk Factors, and Medications (n = 479)

Parameter	Value
Age (y)
Mean ± SD	44.8 ± 11.6
Range	20–83
Sex
Male	243 (50.7)
Female	236 (49.3)
Race
African–American	290 (60.0)
White	181 (37.7)
Asian/Pacific	2 (0.4)
Other	6 (1.3)
Cardiovascular risk factors
Dyslipidemia (known history)	55 (11.4)
Hypertension	187 (39.1)
Diabetes	61 (12.8)
Smoking	283 (59.2)
Family history of CAD	196 (41.0)
Recent cocaine abuse	85 (17.9)
Medication
β-Blockers	11 (2.2)
Calcium antagonist	33 (6.8)
Nitrate	12 (2.6)
Lipid-lowering agent	35 (7.3)
Aspirin	17 (3.5)

TABLE 2

Cardiac Events

TABLE 3

Cardiac Events and Gated SPECT MPI Findings in “False-Negative Scans”

False-negative MPI events	Gated SPECT MPI findings	Timing of injection
PCI 3 d after MPI: LCx, 70% midvessel stenosis	Normal perfusion and function	CP resolved for >3 h
PCI 3 d after MPI: LCx, 90% stenosis; LAD, 20% stenosis; RCA, 50% stenosis	Normal perfusion and function	CP resolved for 4 h
NSTEMI on same day as MPI	Normal perfusion and function	CP resolved for 5 h

LCx = left circumflex coronary artery; LAD = left anterior descending artery; RCA = right coronary artery; NSTEMI = non–ST-elevation myocardial infarction.

TABLE 4

Delayed Image Acquisition

Parameter	Value
Resting perfusion scan results
Normal	41
Abnormal	3
Cardiac events	0
Time intervals
CP to injection
Mean	51 min
Injected during pain^*	64%
Maximum	4 h 20 min
Injection to image acquisition
Mean	3 h 20 min
Minimum	45 min
Maximum	5 h 15 min