Which the sinus aroused in interest are to behave and how to diagnose? 's symptom

Which the sinus aroused in interest are to behave and how to diagnose? 's symptom
Most sinuses are aroused in interest and too slow, especially nerve factor (the tension of nervus vagus increases) Due to person heart rate is at 40- 60 time /min,because it change big, be can there is be symptommed blood flow dynamics. Also there is no important clinical meaning. If not that the apparent sinus is aroused in interest and too slow, the meaning of the other aroused in interest and slow can reduce myocardium oxygen consumption, increase at cardiac muscle break, the ventricle is plentiful and good, so the heart fights the exporting amount to increase each time, can compensate the heart rate to reduce, so the heart of every minute arranges blood volume and has not reduced. But when the heart rate is slowed down lastingly and apparently, the fighting the exporting amount each time of the heart can't increase, the heart of every minute arranges blood volume to reduce promptly, the blood flow volume of coronary artery, cerebral artery and renal artery is reduced, can display symptom of breathing hard, tired, dizzy, uncomfortable in chest etc., can faint when being serious, the coronary heart disease patient can present angina pectoris. This sees more organic heart disease.
The heart rate slows down to but also make the room rhythm of malposition easy to produce lastingly and apparently, organic heart disease patient, especially the acute myocardium infarction patient is apt to take place. Because the density of potassium ion of extracellular fluid increases at the time of acute myocardium infarction, cell membrane the intersection of electric potential and negative value reduce, the intersection of ventricle and malposition get up, it fights some to be easy to take place automatic the intersection of relaxation and issue very much, easy to shrink room tachycardia before one. Because slow myocardium cell it replies time very much to be inconsistent, electric potential vary easy to produce difference of electric potential among the adjacent cell, this can also initiate rhythm of the heart of the malposition.
1.Sinus frequency lt of P wave; 60 times min, are not generally lower than for 40 times min, 24h dynamic electrocardiogram sinus heartbeat lt; 80,000 times.
2. P-R room period 0.12- 0.25s.
3.QRS wave normal.
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