Heart rate variability concepts:
Heart rate variability (HRV) refers to the number of successive cardiac cycles between compiled. Heart rate is not an absolute rule, there are differences between the two beats time smiling, the variance between the inter-connection appears normal cardiac cycle by measuring heart rate variability can be connected (heart rate variability, HRV).
Heart rate variability may be analyzed by detecting the change (i.e., phase change between successive RR) between normal QRS complex in the electrocardiogram measuring consecutive occurrences. Since the new paint oasis reaction sinus rhythm during the PP actually, therefore, be HRV analysis of variance between normal PP interval should be measured continuously arise. Variance between normal PP interval but the P-wave appears. P-wave but not as sharp R-wave, it is difficult to accurately detect the PP interval, but in general, between the PP and RR intervals of the same. Thus, instead of the actual RR interval are PP interval measurement. Sometimes referred to as NN interval.
Heart rate variability heart rate variability detection reflect, different from the index difference in the average heart rate in units of time generally used. If no heart beat points 100 times and 60 times the difference between the heartbeat per minute.
Heart rate variability (HRV) is clinically used as a non-invasive indicator reflects the vegetative nervous system activity, there is a certain significance in helping determine the prognosis of cardiovascular disease. Now to prove that normal large HRV, while suffering from severe coronary heart disease, severe arrhythmia after myocardial infarction, heart failure, blood line, patients with diabetes, hypertension and other HRV is significantly smaller. Clinical application of heart rate variability measured.
Abnormal heart rate variability reasons:
Heart rate variability reflects the interaction between the sympathetic and the vagus nerve. Coordination between them to maintain the normal activity of the heart. Once this interaction disorders, cardiovascular disorders will result, many cardiovascular disease, in particular in the pathogenesis of arrhythmia.
Heart rate variability is high or low for several good:
Heart rate variability analysis is to determine the activity of the autonomic nervous system commonly used quantitative indicators. When the vagus nerve excitability decreased, increased sympathetic activity, reduced heart rate variability. In general, the heart rate variability low (or small changes in heart beat) indicates that the body is under stress from exercise, mental events or other internal or external pressure source. Reduced heart rate variability is one of the risk factors to predict cardiovascular disease death.
Heart rate variability high (greater variability between or heart beat) usually means that the body has a strong ability to withstand stress, or the process of recovery from the previous pressure. In general, the higher the heart rate variability, the stronger the autonomic nervous system regulation. But it is not the higher the better.
Heart rate variability is a balance between vagal and sympathetic reaction of mutual restraint. Therefore, heart rate variability is preferably within the normal range, a good high, low worse.
