Our aim was to observe the induction of panic attacks by a hyperventilation challenge test in panic disorder patients (DSM-IV) and their healthy first-degree relatives. We randomly selected 25 panic disorder patients, 31 healthy first-degree relatives of probands with panic disorder and 26 normal volunteers with no family history of panic disorder. All patients had no psychotropic drugs for at ...

The present investigation examined marijuana use, abuse, and dependence in relation to anxious and fearful responding to panic-relevant bodily sensations elicited by a biological challenge procedure among a sample of young adult marijuana users (n = 64; 46.9% women; M(age) = 20.97, SD = 6.01). Results indicated that those who were dependent on marijuana had greater self-reported panic attack sy...

We explored the comorbidity between panic attacks (PA), whose symptoms can include gastrointestinal discomfort, and gastrointestinal disorders (GD). Structural equation modeling was used to analyze data from 1,874 MZ and 1,498 DZ male-male twin pairs from the Vietnam Era Twin Registry. PA and GD were associated (relative risk for GD = 2). The percentage of liability due to genetic factors was e...

OBJECTIVE Findings showing that individuals with panic disorder (PD) are prone to experience panic attacks when inhaling CO2-enriched air have given rise to the hypothesis that physiological systems underlying the experience of suffocation may be important in the etiology of PD. In this study, we tested several predictions stemming from this view. METHODS Forty individuals with PD and 32 cont...

The present study examined a relapse prevention (RP) program delivered via bibliotherapy in the treatment of individuals with panic attacks. Compared with a wait list control group, individuals receiving RP exhibited significant reductions on measures of frequency of panic attacks, panic cognitions, anticipatory anxiety, avoidance, and depression. In addition, individuals in the RP group were m...

OBJECTIVE The authors examined the effect of panic provocation on the subsequent development of panic attacks and panic disorder in nonclinical subjects with no history of spontaneous panic. METHOD Sixty-two subjects who had completed a study examining fearful responses to a single vital capacity inhalation of 35% CO2 were reevaluated 1 year following the challenge test. RESULTS Challenge-i...

Fear learning is thought to play an important role in panic disorder. Benign interoceptive sensations can become predictors (conditioned stimuli - CSs) of massive fear when experienced in the context of an initial panic attack (unconditioned stimulus - US). The mere encounter of these CSs on a later moment can induce anxiety and fear, and precipitate a new panic attack. It has been suggested th...

Experimental neurochemical provocation of panic attacks in susceptible human subjects has considerably expanded our knowledge of the pathophysiology and psychopharmacology of panic disorder. Some panicogens also elicit short-lived panic-like states in healthy man. This offers the opportunity to assess the anti-panic action of drugs in proof-of-concept studies. However, from current data it is s...

The present study prospectively evaluated cannabis use, abuse, and dependence in relation to the development of panic attacks and panic disorder. Participants at the start of the study were adolescents (n=1709) with a mean age of 16.6 years (SD=1.2; time 1) and were re-assessed 1 year later (time 2) and then again as young adults (time 3; mean age=24.2 years, SD=0.6). Results indicated that can...

Cognitive theories of panic disorder suggest that the catastrophic misinterpretation of bodily sensations is the trigger for a panic attack. A challenge to cognitive theories is the suggestion that dyspnea (shortness of breath) is central to the development of panic and that negative cognitions are byproducts of panic. To examine these seemingly contradictory theoretical perspectives, the prese...