Answer:
panic attack
Step-by-step explanation:
Panic attack:-
Panic attack is an unpredictable abrupt onset of tremendous discomfort or fear which can reach the height or even the peak in seconds or minutes. The symptoms include:-
- Accelerated heart rate
 - Palpitations
 - Pounding heart
 - Shaking or trembling
 - Sweating
 - Shortness of breath
 
Thus, from the given question, Irene's symptoms can be classified as a characteristic of panic attack.