Are cardiac muscles able to increase the size of its fibres?

Answer 1

yes and it can happen in a bad way hypertension

Answer 2

As with all muscle regular exercise can increase it's strength. In the case of cardiac muscle regular cardio-vascular exercise, e.g. 20 - 30 minutes of ,say, brisk walking 3 times a week, can improve the efficiency of the heart. However, if you suffer an M.I. (myocardial infarction (heart attack)), the cardiac muscle which dies is replaced but does not work.

Answer 3

The cardiac muscle fibers are similar to the skeletal muscle fibers in that they will increase in size if worked enough....however, it's usually not a good indication if your heart is enlarging b/c that means it's having to pump too hard to get the blood to your entire body. But yes, the cardiac muscle can increase, but it's typically not good.

Answer 4

yes cardiac mucles can undergo hypertrophy

provided this is due to exercise and not disease thats great - you are increasing your reserve
cardiac fibres are however not like striated skeletal muscle nor exactly like smooth muscle but are their own distinct group

Answer 5

Yes, just like any muscle fibres.
That's what the cardiovascular workouts are for (among other things).

Answer 6

yes

Answer 7

you bet!