Related by context. Frequent words. (Click for all words.) 55 hyperventilating 52 syncope 50 airway obstruction 48 tachycardia 48 breathlessness 47 hypotension 47 hyperventilate 47 ventricular fibrillation 46 hyperventilated 46 fainting spells 46 palpitations 45 hysteria 45 hypoglycemia 45 Vomiting 45 fainting 45 labored breathing 45 bradycardia 45 paranoia 44 oxygen deprivation 44 retching 44 gag reflex 44 giddiness 44 delirium 44 involuntary movements 43 intubation 43 adrenal 43 hysterical 43 sweaty palms 43 somnolence 43 exertion 42 physical exertion 42 exhalation 42 twitching 42 hand wringing 42 apoplexy 42 Hypothermia 42 panting 42 oxygen saturation 41 cognitive dissonance 41 exhaustion 41 wheezing 41 respiratory distress 41 light headedness 41 Discomfort 41 intubated 41 hysterics 41 gasping 41 breathing 41 autonomic nervous system 41 resuscitation 41 disorientation 40 respiration 40 mass hysteria 40 lightheadedness 40 dyspnea 40 sleepiness 40 epinephrine 40 freakout 40 paralysis 40 obstructive sleep apnea 39 fluid retention 39 excitability 39 arousal 39 induced asthma 39 vomiting 39 breathless 39 hypoglycaemia 39 convulsion 39 headache nausea 39 constriction 39 difficulty breathing 39 convulsions 39 Coughing 39 shortness 39 babbling 39 hypo 39 hypochondria 39 hypothermia 39 reflexive 39 arrhythmias 39 babble 38 teeth gnashing 38 breaths 38 anxiety 38 arrhythmic 38 numbness 38 snoring 38 fibrillation 38 hyperbole 38 ischemia 38 heart palpitations 38 hallucination 38 pulmonary edema 38 Sleep apnea 38 drowsiness 38 panic 38 cardiac arrhythmia 38 reflux 38 breathing exercises 38 rapid heartbeat 38 irregular heartbeats