Work cost, as measured by the extra heart beats due to the task, was determined. The results were compared to a similar study in which a 5-pound weight was moved and kcal/minute was used as a criterion. Since the conclusions of the two studies are similar and data for the extra heart...
Their observations on electrically induced extrasystoles are of special interest. The deflection of Q-R-S in the three leads took direction according to a semblance of an orderly manner, when considered in relation to the many points stimulated. This direction of Q-R-S in the three leads ...
Thus, normal or non-failing human hearts showed a decline of -dP/dt in postextrasystole compared with the basal beats, but failing hearts had potentiated relaxation following an extrasystole. 展开 关键词: postextrasystolic relaxation response chronic heart failure relaxation restitution postextra...
Ventricular premature beats (VPBs) can potentially lead to life-threatening arrhythmias, especially in patients with structural heart disease (SHD). However, identifying dangerous VPBs has always been a topic and challenge in clinical research. This study aimed to evaluate the relationship of postext...
Types of arrhythmias include tachycardia, which is a regular acceleration of the heart rate; bradycardia, a regular slowing of the heart rate; and premature atrial or ventricular beats, which are extra contractions within otherwise normal heart rhythm. While occasional irregularities are normal, prolong...
Although auscultation and arterial pulse palpation can diagnose premature ectopic beats, these alone cannot differentiate atrial from ventricular premature beats—an electrocardiogram is required to make this distinction. Bradyarrhythmias can be caused by electrolyte imbalances and structural pathology to the ...
ordination is of such a kind that the normally occurring contractions of the auricle are followed regularly by contractions of the ventricles, and when spontaneous beats have ceased, artificially excited contractions of the ventricle pass through to the auricle and are followed by auri- cular beats....
An EKG test records your heart rhythm and how fast your heart beats. It shows healthcare providers if you have heart block or have had a heart attack. Echocardiogram is a type of ultrasound. Sound waves are used to show the structure and function of your heart. This test may show if th...
and the healing process after heart surgery. There are several types of arrhythmias, depending on where they start in your heart. Some types of arrhythmia are harmless, but others put you at risk of cardiac arrest, which is when your heart stops beating or beats too fast to move your blood...
●Normally, the heart beats 60-100 times a minute. This state is called “normal sinus rhythm” or “normal rhythm.” Depending upon the needs of the body, it may beat faster (sinus tachycardia) due to stress or slower (sinus bradycardia) such as during sleep. ...