Windows might tell you that you can't open it, or in the worst case, you might encounter a SCU file related error message. Before you can open a SCU file, you'll need to figure out what kind of file the SCU file extension refers to. Tip: Incorrect SCU file association errors can be a symptom of other underlying issues within your Windows operating system.
Relevance. Rating Newest Oldest. Best Answer: sinus bradycardia means slow heart rate sinus arrythmia means heart is not beating in the normal rythym but the heart beat is still starting in the right place. Many people live wiht this for their whole lives and never even know they have it. Stress less. Source(s): experience.
Having bradycardia (say bray-dee-KAR-dee-uh) means that your heart beats very slowly. For most people, a heart rate of 60 to 100 beats a minute while at rest is considered normal. If your heart beats less than 60 times a minute, it is slower than normal.A slow heart rate can be normal and healthy.Or it could be a sign of a problem with the heart's electrical system.ealthy young adults and athletes often have heart rates of less than 60 beats a minute. In other people, bradycardia is a sign of a problem with the heart's electrical system. It means that the heart's natural pacemaker isn't working right or that the electrical pathways of the heart are disrupted.