Nifedipine and thallium-201 myocardial perfusion in progressive systemic sclerosis

Journal Article · Thu May 29 00:00:00 EDT 1986 · N.Engl. J. Med.; (United States)

DOI:https://doi.org/10.1056/NEJM198605293142201· OSTI ID:5428824

Kahan, A; Devaux, J Y; Amor, B; Menkes, C J; Weber, S; Nitenberg, A; Venot, A; Guerin, F; Degeorges, M; Roucayrol, J C

Heart disease in patients with progressive systemic sclerosis may be due in part to myocardial ischemia caused by a disturbance of the coronary microcirculation. To determine whether abnormalities of myocardial perfusion in this disorder are potentially reversible, we evaluated the effect of the coronary vasodilator nifedipine on myocardial perfusion assessed by thallium-201 scanning in 20 patients. Thallium-201 single-photon-emission computerized tomography was performed under control conditions and 90 minutes after 20 mg of oral nifedipine. The mean (+/- SD) number of left ventricular segments with perfusion defects decreased from 5.3 +/- 2.0 to 3.3 +/- 2.2 after nifedipine (P = 0.0003). Perfusion abnormalities were quantified by a perfusion score (0 to 2.0) assigned to each left ventricular segment and by a global perfusion score (0 to 18) for the entire left ventricle. The mean perfusion score in segments with resting defects increased from 0.97 +/- 0.24 to 1.26 +/- 0.44 after nifedipine (P less than 0.00001). The mean global perfusion score increased from 11.2 +/- 1.7 to 12.8 +/- 2.4 after nifedipine (P = 0.003). The global perfusion score increased by at least 2.0 in 10 patients and decreased by at least 2.0 in only 1. These observations reveal short-term improvement in thallium-201 myocardial perfusion with nifedipine in patients with progressive systemic sclerosis. The results are consistent with a potentially reversible abnormality of coronary vasomotion in this disorder, but the long-term therapeutic effects of nifedipine remain to be determined.

• Research Organization: Rene Descartes Univ., Paris, France
• OSTI ID: 5428824
• Journal Information: N.Engl. J. Med.; (United States), Vol. 22
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
CORONARIES
BLOOD CIRCULATION
MYOCARDIUM
ISCHEMIA
RADIOISOTOPE SCANNING
VASODILATORS
BIOLOGICAL EFFECTS
CARDIOVASCULAR DISEASES
PATIENTS
PERFUSED ORGANS
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
THALLIUM 201
ARTERIES
BETA DECAY RADIOISOTOPES
BLOOD VESSELS
BODY
CARDIOVASCULAR AGENTS
CARDIOVASCULAR SYSTEM
COMPUTERIZED TOMOGRAPHY
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIAGNOSTIC TECHNIQUES
DISEASES
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
EMISSION COMPUTED TOMOGRAPHY
HEART
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MUSCLES
NUCLEI
ODD-EVEN NUCLEI
ORGANS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
THALLIUM ISOTOPES
TOMOGRAPHY
VASCULAR DISEASES
550601* - Medicine- Unsealed Radionuclides in Diagnostics