First, heart failure is the most common cause of hospitalization among older individuals, accounting for more than a million a year.

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The most common call-out last year was due to incidents on powered pleasure craft, with machinery failure still the most common cause.

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Dr Noble and Dr Winslow, for instance, have been studying how the cellular changes that lead to congestive heart failure and ischaemia (two common heart complaints) can cause arrhythmia.

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