What's the plural form of counterpulsation? Here's the word you're looking for.
Answer
The noun counterpulsation can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be counterpulsation.
However, in more specific contexts, the plural form can also be counterpulsations e.g. in reference to various types of counterpulsations
or a collection of counterpulsations.