What do I do to keep her from having cardiac arrest again? She was completely dead. I gave her CPR and she jumped up and drank some water. Now she's really sleepy and is laying down very limp

I got home tonight and found my kitten unconscious in her kennel, I left her food and water so she didn’t become dehydrated or hungry... I found her yesterday on the side of the road, she had been there a couple of days I know this because I saw her days prior but couldnt catch her. Once I got home I went straight to her kennel to take her out because she had been in there since 11:30 this morning, and I looked in the kennel and she was laying there unresponsive so I immediately opened the kennel and rubbed her to see if I would wake her up once I realized she wasn’t moving I checked her pulse, it was there but very slow, then I started cpr and tried giving her some air by blowing into her mouth, but it didn’t work and her pupils soon became dilated and her heart beat was no longer there.

My cat died today at 10:30 which is two days after being spayed. He was Persian- Angola bred! Today morning at 9:00 AM he vomited foams which later tinged with blood and my sister rushed to the vet. I was at the hospital. She said he had feable breathing and got cyanosis. He was also restless and couldn’t let anyone approach him. When they arrived to the vet, they asked what we feed him . We only have him cat food. She said they gave him some shots which seems to be adrenaline ( coz they said it was life-saving drug). And he died on the way home throwing up blood from his mouth and nose. The fact here is there’s no advanced technique to resuscitate him in my town and veterinary is not quite developed in our country so there’s almost nothing to test him about any diseases. I have spayed all of my male Persian cats with the same vet and there were no problems. I just wanted to know which could possibly cause his death so I could be more careful with my other cats.

My cat fell, his throat knocked the floor, then started having trouble breathing. I got him to the vet, but the car ride made him extremely anxious, as always. The vets saw cyanosis in his gums, so gave him a steroid to decrease any swelling, a painkiller and anxiolytic to get his breathing calmed down, and put him in an O2 chamber. They never looked at his neck and only after they called me to him and told me he was "going" and I told the to save him did they intubate for O2. His heart stopped in minutes and they stopped everything. Later the vet said it was good I didn't ask for revival, as his systems had probably shut down anyway. I never said this, never asked them to stop, and I want to know if they could have given him Epi and CPR, kept supplying O2 beyond the blockage he couldn't breath from, let the neck reduce in swelling, and sent him home to live the rest of his life. I think they were negligent and looked at his age + other conditions, not the immediate accident. What do you think were his chances after his heart stopped? He was 17, had a heart murmur, hyperT, high BP -- all very well-controlled -- and a benign tumour near his thyroid that had been growing into his soft palate (I found out the last part about the progressing aspect of the growth only that night). But despite it all, he was alert, playful, loving, mischievous, regular in terms of elimination, and in no pain on a daily basis.

My 4 year old cat was not eating for a couple of days and i had figured he was throwing a tantrum and wanted more treats like my other 2 cats. He began getting noticeably skinny and losing weight. I came home after 2 weeks of noticing this wanting to make an appt at the vet and saving enough. I found throw up in my room that seemed dried and foamy from the morning and my grandma mentioned she also has throw up her her room. We were able to pinpoint it towards him and found a third episode in a separate room that was just foamy/acidic. He was sitting on all fours near the ground laying down, breathing heavy very visibly. His stomach looked like it was trying very hard to rise up and down. He was grunting every time he took a breath. I called a friend who fosters cats and asked if it should be worrying. She said he might have been choking on his throw up or it went down the wrong “pipe” sort of thing and he may just be overwhelmed from throwing up so much. i believed her but didn’t think he was going to get better over night. I took him into the ER clinic and they admitted him immediately. When i left my house my 2 cats seemed very upset he was leaving which was concerning. They let out meows of concern. Once we arrived, they told us they would run some blood and x-ray him and believed it was his heart. they gave him oxygen and later called and said he had liquid filling in his lungs and that if i didn’t bring him in, he wouldn’t have made it through the night. They said after X-ray and closer examination that he had Grade 3-6 heart failure and fluid build up in his lungs and a heart murmur. Said a lot of fancy terms for it and all i could do was cry for my little one as i had lost my other cat near the same time 3 years ago. I was worried and went home to figure out the next steps and to return in the morning. When i returned in the morning to transfer him, i was told he had suffered cardiac arrest and thankfully i signed the CPR form and they were able to bring him back. They said he was lucky to have been bright back because while doing CPR, he was able to get all liquid out of his lungs and stabilize his breathing. He said he needed to be seen by a vet and put on oxygen and get more lasix. after hours of trying to find some where to take him, we transferred him to a hospital about 20 min away and he was seen and treated. they kept him over night and gave him oxygen and lasix and started with the treatments over night. They said he wanted to be home and was recovering and drinking water. They felt it was best to allow him to return home. It has been 4 days since he has been back and he has been recovering very slowly. He sits in the open areas but right in front of his water bowls and lets his chin rest in it, he walks slowly and very little but makes his way doing things. Has not been bathing him self but has finally began urinating and i’m hoping pooping. He doesn’t meow but has subtle moans to him self and they were quite scary the first 2 nights. He began eating soft wet sticks and soft liquid meals 2 days ago. He hasn’t been hiding very much but we are still concerned with his behavior. My cats either hiss at him and he has no reaction or they follow him around a sleep in the same room as him. He sort of sits and stares at his water with his eyes sort of rolling in. We were told to follow up with a cardiologist and we would know what his chances are from there. I worry because of how young he is and scared he can get easily. I do not want to wake up and find him dead in my house or return from work to him deceased i don’t want to lose Optimus... Any advice would help.