The phrase "considerably heightened" is correct and usable in written English.
It means that something has been significantly increased or intensified. Example: The tension in the room was considerably heightened as the two rival groups faced off. In this example, "considerably heightened" is used to describe the increased level of tension in the room.
What is clear, however, is that his capacity for compelling prose was considerably heightened by tales of cruelty and avarice rather than by dignity and gentleness.
Peer-reviewed research affirms the considerably heightened mortality risk in the month following treatment, demonstrating the need for overdose prevention education aimed at this population.
This has also considerably heightened risk levels, as can be seen, for instance, in banks' Value-at-Risk measurements of their portfolio volatility.
We found that, in cell lysates, VEGF levels were considerably heightened.
From this concentration, the osmotic potential reaches a critical value beyond which active transport processes are impaired and energy requirements for cellular maintenance are considerably heightened.
The considerably heightened standards, already in effect since 2006, will most likely raise the scope of minimum volume effects from what could now be seen as a process consolidation of reallocating the hospital care provision in most parts of Germany.
Moreover, time-varying channels considerably heighten this problem.
For the Piano Trio No. 1 in D minor, Mendelssohn uncharacteristically took the advice of his fellow composer, Ferdinand Hiller, and rewrote the piano part in a more romantic, "Schumannesque" style, considerably heightening its effect.
But recently the toll its policies are taking has heightened considerably, analysts and industry executives say.
This unease has heightened considerably since last June when Sheila suffered a brain haemorrhage and was seriously ill in hospital for weeks.
Although Spain has regularly challenged Britain's 300-year-old control of Gibraltar, the territory's decision to build the reef has heightened tensions considerably.
