Atrio-ventricular block of three degrees refers to any dangerous _'s general knowledge

Atrio-ventricular block of three degrees refers to any dangerous _'s general knowledge
Atrio-ventricular block of three degrees is called complete atrio-ventricular block too, the ones that mean among the room rooms are conducted and is totally blocked, all atriums are excited can't spread into the ventricle, has caused atrium and ventricle to each move about independently, totally disconnect between the room rooms. Blocking can happen at the place where the room room is formed (hand over) , wish bunch or dual the intersection of side and bunch prop up system. It is usually reversible that the complete room room is formed and blocked, generally caused by making myocardial infarction of wall, acute myocarditis or foreign digitalis and is poisoned; And the intersection of room and room form following position, it blocks to be permanent often, getting acute often until myocardial infarction of wall cause before being acute, chronic type often conducted the system (dual side bunches are propped up) Regression changes.
Electrocardiogram characteristic:
(1)P wave and QRS wave have their own laws, independent each other, atrium rate is faster than ventricle rate.
(2)Unless it if if you can't block, take place at room room junction, then QRS is normal in wave,frequency 40- 60 time /divide.
(3)Block happen position under wishing bunches of branch, ventricle get up, fight, come from the ventricle by some, then QRS wave is spacious for deformity, frequency 20- 40 time /divide.
The clinical manifestation of atrio-ventricular block of three degrees depends on the function state of original heart and speed of the ventricle rate. The patient often has dizzy, weak, palpitation, uncomfortable in chest, the serious one presents heart source faintness, angina pectoris or in heart failure. Physical sign: And the rule that the heart rate is slow, the power of first sound is very loud sometimes (cannon sound) ,It is the intersection of room and room that shrink the intersection of time phase and result of change, can hear the intersection of atrium and sound while being even, sometimes is during heart sound intermittence easy to hear low blunt the intersection of atrium and transliteration, it is obvious the neck vein beats. Increase with the fighting amount each time because of a fulling of amount of ventricle relaxation, the patient can have systolic pressure to increase, the pulse pressure is strengthened, even water washes pulse.
It is if at 40 times in ventricle rate /divide by the above,and it is steady to order rhythm, can't is there symptoms obvious, treatment of feasible cause of disease; If ventricle rate too slow, the intersection of QRS and the intersection of wave and spacious deformity (complete ***Connect and block under the place) ,And the person who takes place source faintness of heart, should install the artificial pacemaker treatment. Before the pace maker treatment, can try out atropine, 654- 2, different third base Epinephrine,etc.. We once fixed by wheezing (including different third base Epinephrine) It treat each is acute for myocardial infarction last atrio-ventricular block of three degrees,heart rate since 38 times /if you can't divide, rise until 51 times divide.
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