11/11/2023 0 Comments Normal heartbeat for female![]() ![]() Studies reveal that there is an increase in cardiac output during exercise in both the sexes however different mechanisms coexist. Varying results have been observed with respect to exercise performance and cardiac adaptation in men and women. In addition, men have decreased systolic function than women as age advances. With respect to the cardiac function, women have a better diastolic function than men, however this reduces with ageing in both the sexes. Unlike in women the myocyte number and size is preserved with ageing. This loss is attributed to compensatory hypertrophy in men to maintain adequate heart mass. As men ages they lose an average of 1gm of cardiac mass every year, which is approximately equivalent to 64 million cardiac myocytes. The above result suggests that there is a loss of myocardial mass in males but not in females. Īs age advances there is an increase in both septal and wall thickness in both sexes, however the left ventricular diameter Physiology Sectionincreases only in males. Further women have a different intrinsic rhythmicity to the pacemaker of their hearts, which causes them to beat faster. The smaller female heart, pumping less blood with each beat, needs to beat at a faster rate to match the larger male heart’s output. This difference is largely accounted for by the size of the heart, which is typically smaller in females than males. The average adult male heart rate is between 70 and 72 beats per minute, while the average for adult women is between 78 and 82 beats. The human heart beats approximately 70 to 85 times per minute in an average adult, with a notable difference between the genders. The myocyte hypertrophy is proportionally symmetrical throughout the heart suggesting that there is no sex difference with respect to relative wall thickness of the heart. Thus the male myocyte undergoes a greater degree of hypertrophy when compared to female. It is seen that after puberty there is a 15-30% increase in the heart mass in males which is proportionate to the body size. Further, it is widely accepted that postnatal growth primarily occurs by an increase in cardiac myocyte size as the tissue lose their ability to proliferate shortly after birth. This proves that the number of cardiac myocytes is same in both the sexes. There is no significant difference in the cardiac size between the male and female until the onset of puberty. Normal structure and function of human heart
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