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To assess the acute effects of myocardial infarction on right ventricular function 22 patients were studied utilizing right heart catheterization, radionuclide angiography and two dimensional echocardiography. Thirteen patients had inferior myocardial infarction (Group I) and 9 anteroseptal or anterior (Group II). Hemodynamic findings suggesting right ventricular infarction were present in 3 patients of Group I. Mean radionuclide right ventricular ejection fraction was lower in inferior myocardial patients (38.2 +/- 7.6-Group I vs 50.3 +/- 11.4-Group II, p less than 0.005), while left ventricular ejection fraction in anteroseptal, and anterior myocardial infarction patients (36.8 +/- 10.5-Group II vs 55.9 +/- 7.6-Group I, p less than 0.001). Six patients in Group I presented a depressed radionuclide right ventricular ejection fraction (less than 40%): moreover right ventricular ejection fraction correlated with left ventricular ejection fraction in Group II (r = 0.79, p less than 0.001) but not in Group I (r = 0.55, p = NS). By mean of 2 dimensional echocardiography Group I patients had an increased right ventricular end diastolic area (15.3 +/- 3.8 vs 12.1 +/- 1.2 cm2, p less than 0.05) while Group II an increased right ventricular free wall motion (47.3 +/- 10.7 vs 32.4 +/- 14.1%, p less than 0.005); right ventricular end diastolic area correlated with right ventricular ejection fraction only in Group I (r = 0.60, p less than 0.05). Five patients in Group I and no patients in Group II had an enlarged right ventricular end diastolic area. Therefore, radionuclide and echocardiographic evidence of right ventricular involvement were not always associated with abnormal hemodynamics. Thus, the damaged right ventricular chamber dilates to allow an adequate stroke volume in presence of low ejection fraction; hemodynamic significant right ventricular myocardial infarction becomes evident only in patients with more severe right ventricular compromise; the increase in right ventricular free wall motion in anterior myocardial infarction patients compensates the loss of contribution of interventricular septum contraction.
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
December 1986,
Minerva cardioangiologica,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
April 1987,
Giornale italiano di cardiologia,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
January 1981,
Ceskoslovenska fysiologie,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
July 1989,
Arquivos brasileiros de cardiologia,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
January 1976,
Kokyu to junkan. Respiration & circulation,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
July 1986,
Kardiologiia,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
June 1979,
Kardiologiia,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
January 1983,
Revista espanola de cardiologia,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
August 1973,
Zeitschrift fur Kardiologie,
D Bonaduce, and
G Morgano, and
M Petretta, and
G Conforti, and
R Breglio, and
L Pace, and
D Leosco, and
M Salvatore
August 1980,
Nederlands tijdschrift voor geneeskunde,
