[On myocardial abscess (author's transl)].

Authors describe an abscess in the area of a myocardial infarction. The possibility of surgical treatment is discussed.

[Mediastinal chondrosarcoma (author's transl)].

A 41 years old female patient was operated on account of mediastinal tumour. A chondrosarcoma of 10 X 8 X 8 cm was removed. The patient remained symptomfree and had no complaints over 4 years after the operation, but after this relapse and pulmonary metastasis developed.

Time-dependent changes of collateral coronary reactivity in the dog.

Vascular reactivity of the developing coronary collaterals has been investigated by studying local flow responses elicited by adrenergic and hypoxic stimuli in the ischemic foci of the canine heart. Tissue blood flow was measured by means of the heat clearance technique. The myocardial area explored was rendered ischemic by ligating the left anterior descending coronary artery 2-90 days prior to the experiment.