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对２５例安装永久性起搏器患者采用９９~ｍＴＣ－ＲＢＣ心室造影比较起搏器植入前后其心功能的变化。植入后ＶＶＩ组左室射血分数降低（６５．２±１３．４ＶＳ５８．９±１１．６，Ｐ＜０．０５），ＡＡＩ组无改变。两组的右室射血分数，最大舒张充盈率植入前后无明显差异。结果表明单用射血分数指标估价心功能不如心排血量敏感。
25 patients with permanent pacemaker patients using 99 ~ mTC-RBC ventricular contrast before and after implantation of pacemaker cardiac function changes. The left ventricular ejection fraction of VVI group was lower after implantation (65.2 ± 13.4 vs 58.9 ± 11.6, P <0.05), while there was no change in AAI group. Right ventricular ejection fraction and maximum diastolic filling rate in both groups had no significant difference before and after implantation. The results showed that single ejection fraction index evaluation of cardiac function is less sensitive than cardiac output.