ECG Findings in Methamphetamine Use

1. For Methamphetamine Use Disorder (MUD) Group: \*Inclusion Criteria: * Diagnosis of MUD according to DSM-5-TR * Medication-free for at least one month prior to admission * Age ≥ 18 years and \<65 years * Provided informed consent For Methamphetamine Use Disorder (MUD) Group: \*Exclusion Criteria: • Hypertension * Diabetes mellitus * Chronic kidney disease * Rheumatoid arthritis * Systemic lupus erythematosus * Cardiac illness * Severe neurological disorders * Immunological or systemic illness * Primary psychiatric disorders other than MUD * Alcohol use disorder 2. For Methamphetamine-Induced Psychotic Disorder (MP) Group: \*Inclusion Criteria: * Diagnosis of MP according to DSM-5-TR * Medication-free for at least one month prior to admission * Age ≥ 18 years and \<65 years * Provided informed consent For Methamphetamine-Induced Psychotic Disorder (MP) Group: \*Exclusion Criteria: * Hypertension * Diabetes mellitus * Chronic kidney disease * Rheumatoid arthritis * Systemic lupus erythematosus * Cardiac illness * Severe neurological disorders * Immunological or systemic illness * Primary psychiatric disorders other than MP * Alcohol use disorder 3. For Healthy Control Group: \*Inclusion Criteria: * No psychiatric diagnosis * No systemic or immunological illness * Medication-free for at least one month * Age ≥ 18 years and \<65 years * Provided informed consent For Healthy Control Group: \*Exclusion Criteria: • Hypertension * Diabetes mellitus * Chronic kidney disease * Rheumatoid arthritis * Systemic lupus erythematosus * Cardiac illness * Severe neurological disorders * Immunological or systemic illness * Primary psychiatric disorders other than schizophrenia * Alcohol/drug/substance use