Korean Circ J.  1982 Jun;12(1):99-105. 10.4070/kcj.1982.12.1.99.

Echocardiographic Assessment of Left Ventricular Function in Ventricular Premature Beats

• Nam SH
• Lee BH
• Lee CK

• KMID: 2040202
• DOI: http://doi.org/10.4070/kcj.1982.12.1.99

Abstract

Ventricular premature beats(VPB) are the most common cardiac arrhythmia and frequently found in apparently normal healthy persons as well as in various heart diseases. Postectopic potentiation of ventricular contraction has widely reported by electrocardiography. In this study, the authors performed comparative assessment of the left ventricular function at the preextrasystolic, extrasystolic and postextrasystolic beats by M-mode echocardiography and electrocardiography. The results obtained were as followings; 1) Among 22 patients of isolated, unifocal ventricular premature beats with fully compensatory pause, male were 6 and female 16, mean age being 47.2 years. 2) Hypertensive heart disease was the most common underlying disease of ventricular premature beats(5 patients) and the others were valvular heart diaeases(3), ischemic heart diseases(3), cardiomyopathy(2), intracerebral hemorrhagy(1), atrial septal defect of secundumtype(1), cor pulmonale(1), pericarditis(1), 1degree A-V block(1) and enteric fever(1). In 3 patients the causes were not clarified. 3) R wave amplitude was higher in the postextrasystolic beat(2.02+/-0.79cm) than preestrasystolic beat(1.86+/-0.66cm) 4) PEP/LVET ratio showed more decrease(18%) in postextrasystolic beat than that of preextrasystole. 5) Diastolic filling time of mitral valve was more reduced in the extrasystole than preextrasystole, but that of postextrasystole exceeded the preextrastystole. 6) Aortic cusps separation was more decreased in the extrasystole than preextrasystole and slightly more increased in the postextrasystole than preextrasystole. 7) LVID, LSa, ENa, DeltaEN/Deltat, LVEDV, SV and LV mass showed more decrease in extrasystole compared with those in pre-and postextrasystole, which was higher than preextrasystole. But LVESV was slightly lower in extrasystole than preextrasystole. 8) In extrasystolic beat, LVEDV, LVESV, stroke volume, and ejection fraction of ventri cular premature beat were 15.77%, 0.18%, 24.05% and 12.21% lower, respectively, than those of preextrasystole. And in the postextrasystole, LVEDV, LVESV, stroke volume and ejection fraction were 23.35%, 2.42%, 28.51% and 10.4% higher, respectively, than these of preextrasystole.

MeSH Terms

Arrhythmias, Cardiac
Cardiac Complexes, Premature*
Echocardiography*
Electrocardiography
Female
Heart
Heart Diseases
Heart Septal Defects, Atrial
Humans
Male
Mitral Valve
Stroke Volume
Ventricular Function, Left*