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患者女性,24岁,因风湿性心脏病入院。附图(见第237页)取自入院后的心电监测连续记录,相当于V_5导联。前5次心动P-R间期恒定,均为0.18秒。R_5T波降支有一提早P’波,并以0.58秒的长P＇-R下传心室,引起一形态正常的QRS波。此后直至下行第9个心动,窦性P波似乎消失,然QRS频率依旧。粗看似与基本窦性频率相近的非阵发性交界性心动过速。但仔细观察这段心动的T波较前宽大园钝,其中隐有窦性P。依据为:1.因轻度窦性心律不齐,致使这一段各T波形态略有差异,2.下行
Female patient, 24 years old, hospitalized for rheumatic heart disease. The drawing (see page 237) is taken from a continuous recording of ECG after admission, equivalent to the V_5 lead. The first 5 heart P-R interval was constant, both 0.18 seconds. The R_5T descending branch had an early P ’wave and was delivered to the ventricle with a long P’-R of 0.58 seconds, causing a normal QRS wave. Since then down to the 9th heartbeat sinus P wave seems to disappear, but the QRS frequency remains the same. Coarse and seemingly similar to the basic sinus frequency of non-paroxysmal borderline tachycardia. However, careful observation of this heartbeat T wave blunt than before, which hidden sinus P Based on: 1. Due to mild sinus arrhythmia, resulting in a slight difference in this section of the T wave morphology, 2. Down