Heart block typically causes lightheadedness, fainting, and palpitations. Depending on the severity of the heart block, this can be dangerous. For example, a third-degree heart block can worsen pre-existing conditions, such as heart failure. It can cause loss of consciousness and even sudden cardiac arrest. There can also be chest pain.
Sacral vertebrae: There are 5 sacral vertebral bones. They are represented by the symbols S1 through S5 and are situated between the lumbar vertebrae and the coccyx (the lowest segment of the vertebral column).The sacral vertebrae are normally fused to form the sacrum.hey are represented by the symbols S1 through S5 and are situated between the lumbar vertebrae and the coccyx (the lowest segment of the vertebral column).
The spine is composed of 33 interlocking bones called vertebrae. The lumbosacral region of the spine (or lumbar spine) consists of 5 lumbar vertebrae and 5 sacral vertebrae. The sacral vertebrae, which are fused together, are called the sacrum.1  The lumbar vertebrae of the spine extend from the bottom of the rib cage to the sacrum. 2  The fifth lumbar vertebra is connected to the sacrum. 3  The sacrum is connected to the pelvic bones and the tailbone (coccyx).he lumbosacral region of the spine (or lumbar spine) consists of 5 lumbar vertebrae and 5 sacral vertebrae. The sacral vertebrae, which are fused together, are called the sacrum. 1  The lumbar vertebrae of the spine extend from the bottom of the rib cage to the sacrum.