Final answer:
Recurrent viral infections, QT prolongation, and tetany can be associated with certain viral diseases. For example, QT prolongation can occur in viral myocarditis. Tetany can be caused by viral infections that affect the nervous system.
Step-by-step explanation:
Recurrent viral infections, QT prolongation, and tetany can be associated with certain viral diseases.
For example, QT prolongation, which is a lengthening of the QT interval on an electrocardiogram, can occur in viral myocarditis. This is inflammation of the heart muscle caused by a viral infection. It can lead to arrhythmias and other complications.
Tetany, which is involuntary muscle spasms, can be caused by viral infections that affect the nervous system. The herpes simplex virus, for instance, can cause recurrent viral infections and lead to neurological symptoms including tetany.