RAPID HEART RATE (TACHYCARDIA) — ENDOCRINE LINK
WHAT THIS SYMPTOM USUALLY MEANS
Rapid heart rate occurs with pain, anxiety, fever, dehydration, endocrine disease, or heart complications—especially hyperthyroidism in cats.
MOST COMMON CAUSES
MILD
• Stress
• Excitement
• Heat
MEDICAL
• Hyperthyroidism (cats)
• Cushing’s
• Diabetes
• Anemia
• Dehydration
• Pain
EMERGENCY
• Heart rhythm disturbance
• Heart failure
• Severe dehydration
RED FLAGS
• Rapid breathing
• Collapse
• Pale or blue gums
• Weakness
• If unsure, treat as urgent.
AT-HOME CARE
• Reduce activity
• Keep cool
• Offer water
WHAT A VETERINARIAN WILL CHECK
• Thyroid panel
• ECG
• Bloodwork
• Chest X-rays
• Blood pressure
MOST LIKELY DIAGNOSES
• Hyperthyroidism (cats)
• Pain
• Anemia
• Dehydration
• Heart disease
WHEN TO SCHEDULE
• Today: rapid rate at rest
• 48 hrs: persistent mild tachycardia
LONGEVITY IMPACT
Sustained tachycardia damages the heart, kidneys, and brain.
LONGEVITY CONSULT
Ideal for senior cats or pets with multiple metabolic signs.