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Sino-auricular heart block is an exceedingly infrequent clinical condition, with only four satisfactory clinical cases reported in the literature up to 1908.
Sino-auricular heart block is a rare conduction abnormality historically diagnosed using venous pulse recordings.
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Sino-auricular block was historically rare; leaves open updated incidence with modern ECG and monitoring.
While abnormalities in conduction and partial or complete blocking of the cardiac impulse at the auriculoventricular junction is a fairly frequent clinical condition, similar disturbances at the sino-auricular junction are apparently exceedingly infrequent in the higher animals and in man. So far as we have been able to find, only four clinical cases in which the diagnosis was satisfactory have been reported. The first case was reported by Mackenzie¹in 1902, in a patient during an attack of influenza. The second case was reported by Wenckebach²in 1906, in a man, aged 30, who was apparently normal aside from the disturbance in the heart rhythm. The third case, described by Hewlett³in 1907 and the fourth by Rihl⁴in 1908 were in cases of advanced cardiac and arterial disease. In all of these the diagnosis was made by the aid of the venous pulse and rests
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J. A. E. Eyster (1915) conducted a review in Sino-auricular heart block. Sino-auricular heart block is an exceedingly infrequent clinical condition, with only four satisfactory clinical cases reported in the literature up to 1908.
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