Sinus _'s symptom of differential diagnosis that accelerates aroused in interest

Sinus _'s symptom of differential diagnosis that accelerates aroused in interest
1.Popping room tachycardia and sinus phenomenon of overlapping on P wave frequency of tachycardia, so apt to cause the difficulty which the two distinguish. What time the following can be helped to distinguish:

(1)P' wave of popping room tachycardia is different from sinus P wave.
(2)P' wave frequency of popping room tachycardia is mostly 100- 180 times min, mostly in 160 times about min. And P wave frequency of sinus tachycardia seldom exceeds 150 times min under 140 times min more. And (inhale, enable the heart rate accelerate, exhale to enable the heart rate slow down deeply deeply) Wait for the influence of the factor, and popping room tachycardia is free of the above-mentioned factor.
(3)The outbreak of popping room tachycardia was in order to break out suddenly, stop suddenly, compensate intermittences while stopping. And sinus tachycardia takes place gradually, and stop gradually, has not compensated the intermittence while stopping.
(4)An absolute law among P-P at the time of popping room tachycardia, at the time of and sinus tachycardia, one often has slight abnormality among P-P.
(5)Popping room tachycardia often has room natures that shrank, appeared before one before and after breaking out, but there is no room to shrink before one in sinus tachycardia.
(6) By oppressing methods to stimulate the nervus vagus such as eyeball or carotid sinus,etc., self-disciplining room tachycardia can't be stopped but brought out atrio-ventricular block; And returning tachycardia can be stopped or brought out atrio-ventricular block in the room. The frequency of sinus tachycardia can slow down gradually through the above-mentioned methods, it was impossible to be stop suddenly; And stop can return to the original very fast level at the time of oppression.
2.Sinus ST-T that appear change and the intersection of differentiation and sinus that ST-T change can display section ST reduce and T to invert in wave when the tachycardia at the coronary heart disease when the tachycardia. Shorten section T-P sinus at the time of tachycardia,it last P wave with its before T wave overlap,at this moment can't if you can't regard section T-P as, wait for by electric potential line, go to judge whether ST reduce. Because P2, relatively high and sharp at the time of sinus tachycardia, replying the unexpected turn of (Ta) very much of its P wave Also is relatively obvious, back segment its can extend to section ST, cause section ST reduce, on display in 2, lead, unite mainly. When the coronary heart disease patient presents sinus tachycardia, can cause the relativity blood supply of coronary artery to be insufficient, cause section ST to reduce and T wave to change. The change of ST-T could return to normal for some time often after some patients are at sinus tachycardia. So can't simple the intersection of basis and change of ST-T go to diagnose coronary heart disease when sinus tachycardia, must combine the clinical actual conditions to consider in an all-round way.
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