On April 12, 1853, Scottish cardiologist Sir James Mackenzie was born. A pioneer in the study of cardiac arrhythmias, he was first to make simultaneous records of the arterial and venous pulses to evaluate the condition of the heart, a procedure that laid the foundation for much future research.
James Mackenzie was apprenticed to a chemist when he was 14 and even though he was offered a partnership with the company, he preferred to study medicine. Mackenzie passed the entrance examination at the University of Edinburgh in 1874 and became a qualified as a doctor four years later. He became a general practitioner in borough of Burnley in Lancashire, England and continued to practice there for more than two decades. Mackenzie completed his MD degree on hemi-paraplegia spinalis.
After some years of research, Mackenzie left general practice and become a specialist cardiologist. Still, it is believed that he had quite some concerns about the specialisation of medicine including cardiology stating ‘I fear the day may come when a heart specialist will no longer be a physician looking at the body as a whole, but one with more and more complicated instruments working in a narrow and restricted area of the body – that was never my idea‘. Mackenzie used Riva-Rocci’s sphygmograph to graphically record the pulse and later also deviced some polygraph which allowed him to make simultaneous records of the arterial and venous pulses. Mackenzie attempted to evaluate the condition of the heart and to measure the AV interval and in 1890 he discovered premature ventricular contractions. Further, the use of the polygraph enabled Mackenzie to make original distinctions between harmless and dangerous types of pulse irregularities (arrhythmias). He further demonstrated the efficacy of Digitalis in the treatment of arrhythmias and made important contributions to the study of the energetics of the heart muscle.
James Mackenzie left Burnley for London in 1907 to work as a consulting physician. He was elected a Fellow of the Royal Society and was knighted in 1915. He later founded the Mackenzie Institute of Clinical Research in St Andrews, which involved local General Practitioners in detailed long-term recording of patients‘ symptoms and illnesses.
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