Comparison of coronary angiography and early oral dipyridamole thallium-201 scintigraphy in patients receiving thrombolytic therapy for acute myocardial infarction

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · American Heart Journal; (USA)

DOI:https://doi.org/10.1016/0002-8703(90)90199-8· OSTI ID:6323484

Jain, A; Hicks, R R; Myers, G H; McCarthy, J J; Perry, J R; Adams, K F ^[1]

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1. Univ. of North Carolina Hospital, Chapel Hill (USA)

We evaluated 50 consecutive patients who received thrombolytic therapy for acute myocardial infarction using thallium-201 single photon emission computed tomography in combination with oral dipyridamole to assess the frequency of residual myocardial ischemia. Thallium studies were performed early after myocardial infarction at a mean of 4.6 days. The time from the onset of chest pain to the administration of thrombolytic therapy was 2.6 hours (range 0.5 to 5.5). Q wave myocardial infarction was evident in 46 patients; four patients had a non-Q wave infarction (anterior infarction in 31 patients and inferior infarction in 19 patients). The serum mean peak creatinine kinase was 1503 IU/L (range 127 to 6500). Coronary angiography was performed in all patients at a mean of 3.1 days (range 2 to 10) and revealed the infarct-related vessel to be patent in 36 patients (72%). The ejection fraction was 48% (range 26% to 67%). After dipyridamole administration, 13 patients (26%) developed angina that was easily reversed with the administration of intravenous aminophylline. Systolic blood pressure decreased from 122 to 115 mm Hg (p less than 0.05) and the heart rate increased from 76 to 85 beats/min (p less than 0.05). None of the patients had significant hypotension, arrhythmias, or evidence of infarct extension. Perfusion abnormalities were present on the initial thallium images in 48 patients. Redistribution suggestive of ischemia was present in 36 patients (72%). Ischemia confined to the vascular distribution of the infarct vessel was evident in 22 patients. Seven patients had ischemia in the infarct zone as well as in a remote myocardial segment. Thus 29 patients (58%) had ischemia in the distribution of the infarct vessel. Ischemia in the infarct zone was evident in 19 of 36 patients with open infarct vessels and in 10 of 14 patients with occluded infarct vessels.

• OSTI ID: 6323484
• Journal Information: American Heart Journal; (USA), Vol. 120:4; ISSN 0002-8703
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
HEART
IMAGE PROCESSING
ISCHEMIA
DIAGNOSIS
BIOMEDICAL RADIOGRAPHY
BLOOD PRESSURE
COMPARATIVE EVALUATIONS
MYOCARDIAL INFARCTION
PATIENTS
PHOSPHOTRANSFERASES
SCINTISCANNING
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
THALLIUM 201
VASODILATORS
BETA DECAY RADIOISOTOPES
BODY
CARDIOVASCULAR AGENTS
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
COMPUTERIZED TOMOGRAPHY
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIAGNOSTIC TECHNIQUES
DISEASES
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
EMISSION COMPUTED TOMOGRAPHY
ENZYMES
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEDICINE
NUCLEAR MEDICINE
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PHOSPHORUS-GROUP TRANSFERASES
PROCESSING
RADIOISOTOPE SCANNING
RADIOISOTOPES
RADIOLOGY
SECONDS LIVING RADIOISOTOPES
THALLIUM ISOTOPES
TOMOGRAPHY
TRANSFERASES
VASCULAR DISEASES
550601* - Medicine- Unsealed Radionuclides in Diagnostics