Heart and blood

IN THE LABORATORY WORK

“Where is the biological laboratory please”, -“Go up the stairs to the third floor, them turn to the right and go down the corridor. The laboratory is at the end of the corridor”, -Thanks.

I followed these directions and soon reached the laboratory. I pushed open the door and entered a large room where some twenty or twenty-five students were working sitting in groups of three or four at small square tables some of them were looking through microscopes, others were drawing or writing something down in their note-books. A young woman, probably the laboratory instructor, was moving about the room going from table to table and supervising the work of the students.
I looked round. In the right-hand corner of the room there was a large table on which a number of various objects were scattered: flasks and jars of various sizes, test-tubes, bearers, gloss plates a long with loose sheets of paper, some drawing and photos. A laboratory assistant was busying himself with diagrams and biological preparations making everything ready for the lecture of the professor.
I approached one of the small tables where two students were examining something under the microscope. I asked them what they were doing. That answered that, they were studying one of the most primitive animals, the amoebae. I also looked through the microscope something like a minute clot of jelly was moving slowly over the glass plate – it was the amoebae.
At the next table a student was going to dissect a frog in order to examine its internal organs. I watched him make a cut with a sharp knife through the breast – bone of the frog and remove carefully the skin and the muscles between its, forelegs. In this way he exposed the frog’s heart which continued to beat.
Angina Pectoris

On being admitted to the in-patient department the patient complained of pains in the chest.

He had been suffering from pains of various intensity in the chest and behind the breastbone for several weeks. The patient noted the pain to radiate to the left shoulder and down the arm. The patient also observed the pain have been growing worse on moving. He stated that it frequently began suddenly at night during sleep.
During the attacks of pain he was covered with cold perspiration and his face was pale. The incidence of attacks was frequently associated with physical and mental overstrain.
On physical examination the doctor revealed areas of very sensitive skin from the 7^th cervical vertebra to the 5^th upper thoracic one. On percussion, palpation and auscultation of the heart no significant abnormality was revealed.
The electrocardiogram taken during the attack showed a disturbance in the blood flow. The most important readings of the electrocardiogram were either diminished or deviated. By having repeated the electrocardiogram after the end of the attack the cardiologist found the adequate readings of the electrocardiogram to return to normal ones.
During the attacks of moderate pain no changes in the peripheral blood or elevation of body temperature were noted. However the temperature rose insignificantly and there was an accompanying slight leucocytosis when the attacks of pain were particularly severe.