Page "Cardiology diagnostic tests and procedures" Paragraph 1

Obtaining a medical history is always the first " test ", part of understanding the likelihood of significant disease, as detectable within the current limitations of clinical medicine.

Yet heart problems often produce no symptoms until very advanced, and many symptoms, such as palpitations and sensations of extra or missing heart beats correlate poorly with relative heart health vs disease.

Hence, a history alone is rarely sufficient to diagnose a heart condition.