Can HCM cause sudden death? Are there any warning signs to look out for?

In a small number of patients, HCM can cause sudden death, although this is much rarer in Noonan syndrome/RASopathies than in other forms of HCM. We have found that certain markers on echo and the history can help identify which patients with HCM have a higher risk and would benefit from implantation of an ICD – the cardiologist will be looking at these markers and will be best placed to decide whether there are any markers of increased risk