  Orthogonal polynomials satisfy a recurrence relation of order two, where
appear two coefficients. If we modify one of these coefficients at a certain
order, we obtain a perturbed orthogonal sequence. In this work we consider in
this way some perturbed of Chebyshev polynomials of second kind and we deal
with the problem of finding the connection coefficients that allow to write the
perturbed sequence in terms of the original one and in terms of the canonical
basis. From the connection relations obtained and from two other relations, we
deduce some results about zeros and interception points of these perturbed
polynomials. All the work is valid for arbitrary order of perturbation.
