The sudden pulse spikes, vertigo, and 'feeling of impending doom' (uneasiness) you described are hallmark symptoms of Panic Attacks or Paroxysmal Tachycardia. Since your resting ECG and BP are normal, your heart is likely healthy, but it is overreacting to stimulants. Caffeine and Nicotine (from smoking) are powerful vasoconstrictors and cardiac stimulants. Over time, your body's 'Tolerance' can change, meaning what was fine earlier can now trigger an exaggerated 'Fight or Flight' response, leading to these 30-45 minute episodes of intense anxiety and rapid heart rate."
Next Steps
Square Breathing: When you feel the 'uneasiness' starting, use the 4-4-4-4 technique (inhale for 4s, hold for 4s, exhale for 4s, hold for 4s). This physically signals your nervous system to calm down.
Identify the Pattern: Keep a diary of exactly when these spikes happen. Check if they are linked to lack of sleep, dehydration, or specific stressful thoughts.
Stimulant Detox: Strictly avoid caffeine and smoking for the next 2 weeks to see if the frequency of these episodes drops. This is the most effective diagnostic tool you have right now.
Health Tips
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