The common cold is generally mild and self-limiting with most symptoms generally improving in a week. Half of cases go away in 10 days and 90% in 15 days. Severe complications, if they occur, are usually in the very old, the very young, or those who are immunosuppressed.
Types of sick sinus syndrome and their causes include: 1  Sinoatrial block. Electrical signals move too slowly through the sinus node, causing an abnormally slow heart rate. 2  Sinus arrest. The sinus node activity pauses.  Bradycardia-tachycardia syndrome.
For the first minutes after a sudden cardiac arrest, the victim may gasp. Gasping is not breathing. Additional causes of respiratory arrest can include diseases or injuries that. Â© 2006 American Heart Association 6 reduce brain function or interfere with normal contraction of the muscles of breathing.