I want to give additional details on this.
most sites give negative advise on this only method of self-CPR, altough
they do acknowledge that in certain cases it could theoretically prolong someones consiouss state by helping with the bloodflow (?for a few moments?)
but they advise you to immediately call for help as long as you are able to, instead of wasting precious moments. Only when you know you are going to pass out, you could try it to stay consiouss. They also say it is important to know that there are different kinds of hearfailures, not all ending in cardiac arrest and some require you to stay calm. Look for more info at medical related sites.
