It is reported on methods of positioning our former described flow directed thermodilution (TD) catheter by the intracardiac ECG derived from two electrodes, one at the tip of the catheter near the temperature sensor and the other six centimeter proximally of it. The typical criterion of the intracardiac ECG in the outflow tract of the right ventricle and in the pulmonary artery are listed, especially the amplitudes, the QRS-splits, T-wave inversion and P-wave configuration.
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