Between November 1982 to September 1984

the ECG monitor of 73 cases of EMCB had been investigated. With right heart biopsy the sitting of the bioptome within the cardiac cavity and the cardiac wall must be confirmed by an intracardiac ECG. This was done by connecting the bioptome handle directly to the chest lead of an electrically isolated ECG. Note the progressive change in the form of the P wave and QRS complexes as the bioptome was drawn down from the upper part of the right atrium to the lower part of the right ventricle. Once the bioptome getting in contact with the ventricular wall

the ECG will show marked elevation of ST segment. The intracardiac ECG showed that the instrument was positioned correctly. When the myocardium was pinched

forty five of 73 patients were recorded transient arrhythmias but there was no subsequent problem.