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Transvenous pacemakers are not attached externally on the skin, but rather involve a catheter that is inserted through a vein and threaded to the heart. The pacing lead is positioned inside the heart, typically in the right ventricle, and is responsible for delivering electrical impulses to maintain a proper heart rhythm.

The external component of a transvenous pacemaker includes a pulse generator that is usually placed outside the body but is connected to the lead that has been inserted. Therefore, the statement that transvenous pacemakers are attached to the skin on both the front and back of the patients is incorrect, leading to the conclusion that the answer is indeed false.