A proximal LAD lesion is a blockage in the left anterior descending artery, also known as the anterior interventricular artery. Explain why a heart attack caused by an obstruction of this artery is sometimes referred to as the “widow maker” heart attack.
What will be an ideal response?
Answer: A blockage in the anterior interventricular artery prevents oxygen from reaching cardiac muscle cells in both ventricles. The atria are not powerful enough to pump blood to the lungs and body.
You might also like to view...
Genes on the X chromosomes are ________.
A. X-linked B. polygenic C. holandric D. Y-linked E. simple
Which structures are responsible for creating a direct electrical connection between cardiac muscle cells?
A) gap junctions B) maculae adherens C) intercalated discs D) desmosomes E) fascia adherens
The site where spinal nerves exit the vertebral column is the ________.
A. vertebral foramen B. intervertebral foramen C. intervertebral disk D. spinous process E. lamina
Which of the following muscles are named based on their shape? (Check all that apply.)
A. Superior rectus B. Pectoralis major C. Deltoid D. Teres major E. Orbicularis oris