Home Defibrillator Manufacturers

I have been trying to be prepared in case of emergencies. I have heard that it is a good idea to get a home defibrillator if you think that one of your loved ones might have a heart attack. My father in law is going to be visiting us this next Christmas and with his heart problems, I think that it might be a good idea for my family to get one. Could anyone send a comment and let me know what might be the best kind to get? I am looking into them and want to know a little bit more about the home defibrillator manufacturers and their products. I am really not sure which kind to get at all! Thank you very much for this opportunity to post here.