Modified Method of Contrast Transthoracic Echocardiography for the Diagnosis of Patent Foramen Ovale

Table 1

Baseline clinical characteristics of the study population.

Clinical features	N (%)
Age (year) mean ± standard deviation	41.49±13.34
Sex (male/female)	192/314
Hypertension	66/506(13.04%)
Diabetic mellitus	62/506(12.25%)
Coronary heart disease	36/506(7.11%)
Arrhythmia	16/506(3.16%)
Clinical symptoms
Cryptogenic stroke	156/506(30.83%)
Transient ischemic attack	64/506(12.69%)
Migraine	128/506(25.29%)
Cerebral infarction	99/506(19.56%)
Loss of consciousness	39/506(7.70%)
Hypoxemia	18/506(3.55%)