Atrio-ventricular block is diagnosed to check _'s symptom for a time

Atrio-ventricular block is diagnosed to check _'s symptom for a time
Diagnose: The electric chart of heart appears:
1.Each sinus the intersection of P and wave can lay, reach the ventricle and QRS-T wave group produces.
2 one among P-R> 0.20s (adult) ,One is greater than or equal to 0.18s (child under the age of 14) among P-R .
Check in the laboratory: There is not a relevant materials report yet at present.
Other auxiliary examination: Electrocardiogram characteristic:
1.Typical electrocardiogram characteristic of atrio-ventricular block for a time
(1)Every sinus the intersection of P and wave can lay, pass the ventricle and QRS-T wave group produces.
(2)One among P-R> 0.20s (adult) ; Child (14 Under years old) One is greater than or equal to 0.18s among P-R.
(3)One is greater than normal supreme value (depend on heart rate) among P-R .
(4)When heart rate have change notably, issue, than increase 0.04s to be the above-mentioned before, even if one can still be diagnosed in normal range among P-R among the P-R.
2.The blocking the manifestation of the position in the electrocardiogram of atrio-ventricular block for a time
(1)The electrocardiogram characteristic of atrio-ventricular block for a time caused in the atrium:
P The wave increases widely, cut marks, one is lengthened among P-R, but section P-R is scarcely lengthened. And the atrio-ventricular block for a time of the room room knot is that the section P-R is lengthened, can accompany or not increase with P wave widely. Issues of intensity that lengthen getting prominent among the P-R '> 0.40s) Mostly block while forming for a time for the room room, secondly because block in the atrium.
Only among P-R one is lengthened, but P wave does not increase widely or cut the mark. Conduct the delay to often make P wave amplitude on the body surface electrocardiogram reduce in the serious atrium notably, this type is very difficult and the room room knot one blocks distinguishing, only by wishing to check in one bunch of electric pictures for a time, if one is lengthened, can make a definite diagnosis of among P-A.
The electrocardiogram characteristic of atrio-ventricular block for a time happening in the room room is formed: Usually one among P-R> 0.40s person. Mostly in order to form in the room room due to block for a time. It is that one among A-H was lengthened to display in wishing one bunch of electric pictures, one lengthened report delayed while forming in room room for a time up to 900ms when once there was A-H.
(3)Happen on wish - cause by system Pu electrocardiogram characteristic of atrio-ventricular block have two kinds of behavior for a time:
Issue lengthen, prop up, block with bunch and branch block among the P-R: It is the intersection of incompleteness and Left deviation of unsymmetry that add the right bunch and prop up and block (namely one side bunch will be propped up and totally blocked probably, the offside bunch is propped up and blocked for a time) . Do not prop up blocking with bunch more in the blocking for a time of room room knot. So the room room forms and blocks one side bunch companions to prop up while totally blocking for a time. Still can't except pair horizontally block.
Only among P-R one is lengthened but not blocked with one bunch of propping up or branches: This is added the right bunch and props up blocking for a time by the symmetrical left. Unable with blocking distinguishing for a time of room room knot in the body surface electrocardiogram. Bunches of electric picture observe, issues of> 0.28s person under P-R, overwhelming majority whether room room marry, block, produce according to wish. Now while finding in check bunch is latent while propping up the figure, should confirm as dual side bunches and prop up and block. Wish bunch form to if you can't block, show as whether because lengthen issue A-H, and prop up to block until there lengthen is issue among H-V dual side bunch for a time room room. So, by wishing one bunch of electric pictures fixes blocking the position is most reliable.
3.Detailed description of the typical electrocardiogram
(1)The size of one relates to heart rate among P-R. On the normal heart, when obviously increasing fast in heart rate, one can be thereupon shortened among P-R; But while there is heart disease, the heart rate can make one among P-R lengthen to increase instead fast. No matter what is heart rate, only the intersection of adult and issues of> 0.20s, the intersection of children> and 0.18s, limit at being normal of issue under P-R exceed corresponding heart rate, under P-R, should diagnose as the atrio-ventricular block for a time.
(2)In copying the electrocardiogram written at different time with a person if the heart rate has not obviously changed, and one increases above 0.04s, should consider the possibility of atrio-ventricular block for a time among P-R, among the P-R that lengthen within issue pay limit normally still. This is because one will not usually change among P-R, unless the heart rate is very fast. In addition, when increasing fast in heart rate, one is not shortened, has lengthened above 0.04s than before instead among P-R, also should consider the atrio-ventricular block for a time.
(3)Usually one among P-R of atrio-ventricular block is mostly 0.21- 0.35s for a time, but can be longer sometimes, even can reach 1.0s. Because a prominent extension among P-R sometimes, QRS wave takes place relatively late. So, in T wave that the next P wave may overlap in it, it is apt to misdiagnose for rhythm of the heart of handing over area of room room. Must observe carefully at this moment.
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