A heart attack may present with subtle signals beyond classic chest pain, including pressure, heaviness, or a general feeling of unease. These prodromal symptoms, accounting for about 68 percent of early warnings, can radiate to the arms, jaw, or shoulder blades. Shortness of breath, even at rest or during minimal activity, indicates compromised cardiac output and is a frequent primary warning sign, particularly for women. Prompt medical evaluation is advised for any concerning symptoms.