URL：https://www.researchgate.net/publication/362955383/figure/fig1/AS:11431281081122807@1661519018735/High-grade-Atrioventricular-block-AV-Second-degree-heart-block-with-P-QRS-ratio-of.png
掲載元：https://www.researchgate.net/figure/High-grade-Atrioventricular-block-AV-Second-degree-heart-block-with-P-QRS-ratio-of_fig1_362955383
