Contraction

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Related to premature ventricular contraction: premature atrial contraction

Contraction

In a business cycle, the time between the peak and the bottom. That is, a contraction occurs between the end of economic growth and the end of the subsequent recession. Contractions are characterized by layoffs, a decline in GDP, and other negative factors. However, historically, contractions have tended not to last as long as expansions.
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References in periodicals archive ?
If it is less than or equal to 0.5, it is classified as a premature ventricular contraction signal.
(a) Pooled data for time to onset from ventricular fibrillation (VF) and premature ventricular contractions (PVC).
2D-ECHO, Bi-dimensional echocardiogram; BMI, body mass index; CK, creatinine kinase; CRP, c-reactive protein; CV, conduction velocity; DCM-CD, dilated eardiomyopathy with conduction defect disease; EDMD, Emery Dreifuss Muscular Dystrophy; ECG, electroeardiogram; EMG, needle electromyogram; LMNA, laminA/C; LGMD, limb girdle muscular dystrophy; LVEF, left ventricular ejection fraction; METs, metabolic equivalents; MU, motor unit; MUGA, multigated acquisition; NE, nuclear envelope; PVC's, premature ventricular contractions
During April 19-25, in addition to MI, nine other serious adverse events were reported: one case of respiratory distress, one case of coronary artery disease, one case of angina, one case of persistent fatigue, one case of premature ventricular contractions, and four cases of headache (Table 2).
Two or three weeks following the patient's admission, he suffered increasing episodes of premature ventricular contractions (PVCs) and bradycardia (a slow heart rate).
For the past 15 years I've known that I have a mild mitral valve prolapse (MVP), with premature ventricular contractions (PVCs) that I can feel.
Excessive use can cause premature ventricular contractions (Greden, 1974; Greden, Victor, Fontaine, & Lubetsy, 1980).
After resuscitation, pulmonary edema developed; the patient had a systolic blood pressure of 60 mm Hg, a pulse rate of 120 beats/min, and frequent premature ventricular contractions. Electrocardiogram showed sinus tachycardia with frequent ventricular premature contractions and an acute extensive anterior myocardial infarction.
Kwon notes that palpitations may be signs of ectopic heartbeats, such as premature ventricular contractions (PVC) and premature atrial contractions (PAC).
[5] Cardiac dysrhythmias commonly associated with MVP are nonspecific and may include both supraventricular (sinus tachycardia, atrial fibrillation, atrial flutter, junctional tachycardia) and ventricular (premature ventricular contractions, ventricular tachycardia) dysrhythmias.
This raises the risk of irregular beats from the top chambers of the heart (such as atrial fibrillation, see previous page) or from the bottom chambers (premature ventricular contractions or PVCs).
In addition, most cardiac monitors will include premature ventricular contractions (PVCs) or other abnormal beats when calculating heart rate.