1891, Charles Hilton Fagge and Philip Henry Pye‐Smith, Text‐Book of the Principles and Practice of Medicine, J. & A. Churchill; third edition, page #37:
It is doubtful whether enlargement of the heart ever causes increased prominence or bulging or the præcordial region and widening of the intercostal spaces, as compared with the corresponding parts on the opposite side of the chest.
1946, Franklin Bicknell and Frederick Prescott, The Vitamins in Medicine; page #262:
They state that there is a type of præcordial pain which has a different clinical picture and pathogenesis from those of angina pectoris and coronary occlusion and which may appear in persons with a normal cardiovascular system or in cardiovascular diseases.
