Single Dose of BI 1744 CL in Patients With Mild and Moderate Hepatic Impairment Compared to Subjects With Normal Hepatic Function

Inclusion Criteria: Healthy subjects: * Healthy males and females according to the following criteria: Based upon a complete medical history, including the physical examination, vital signs (BP, PR), 12-lead ECG, clinical laboratory tests. The healthy subjects must meet the matching criteria based on the matching approach * Age \>21 and \<75 years * Body Mass Index (BMI) \>18.5 and \<32 kg/m2 * Creatinine clearance \>70 mL/min according to Cockcroft \& Gault * Signed and dated written informed consent prior to admission to the study in accordance with Good Clinical Practice (GCP) and the local legislation Hepatically impaired subjects: * Hepatically male and female impaired subjects determined by results of screening classified as * Group 1 (Child-Pugh A; Child-Pugh score of 5-6 points) and as * Group 2 (Child-Pugh B; Child-Pugh score of 7-9 points) * Age \>21 and \<75 years * BMI \>18.5 and \<34 kg/m2 * Creatinine clearance \>40 mL/min according to Cockcroft \& Gault (for hepatically impaired patients) * Signed and dated written informed consent prior to admission to the study in accordance with GCP and the local legislation Exclusion Criteria: Healthy subjects who meet any of the following criteria will not be entered into this trial: * Any finding of the medical examination (including BP \[\>140 mmHg systolic and or \>95 mmHg diastolic\], PR and ECG) deviating from normal and of clinical relevance * Any evidence of a clinically relevant concomitant disease * Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders * Relevant gastrointestinal tract surgery (except appendectomy, herniotomy) * Diseases of the central nervous system (such as epilepsy, seizures) or psychiatric disorders or neurological disorders * History of relevant orthostatic hypotension, fainting spells or blackouts * Chronic or relevant acute infections (e.g. including Hepatitis B and C and HIV) * History of allergy/hypersensitivity (including drug allergies) that are deemed relevant to the trial as judged by the investigator * History or presence of allergy against iodine and/or contrast agent, latent or manifest hyperthyrosis or allergic diathesis to indocyanine green * Intake of drugs that are contraindicated in connection with the indocyanine green test * Intake of drugs with a long half-life (\>24 hours) within at least one month or less than 10 half-lives of the respective drug prior to administration or during the trial * Participation in another trial with an investigational drug within one month after previous single dose administration or two months after previous multiple dose administration prior to administration or during the trial * Smoker (more than 10 cigarettes or 3 cigars or 3 pipes per day) * Inability to refrain from smoking when confined to the study site on trial days * Alcohol abuse (more than 40 g/day in males, more than 20 g/day in females) * Drug abuse, in the investigator's judgement upon review of the patient's history and urine screening for abused substances * Veins unsuited for iv puncture on either arm (e.g. veins which are difficult to locate, access or puncture, veins with a tendency to rupture during or after puncture) * Blood donation (more than 100 mL within four weeks prior to administration or during the trial) * Excessive physical activities (within 48 hours prior to trial or during the trial) * Any laboratory value outside the reference range that is of clinical relevance in the opinion of the investigator * Inability to comply with dietary regimen of study centre * Subjects not able to understand and comply with protocol requirements, instructions and protocol-stated restrictions Hepatically impaired subjects who meet any of the following criteria will not be entered into this trial: * Medical disorder, condition or history of such that would impair the subject's ability to participate or complete this study in the opinion of the investigator or the sponsor * Severe cerebrovascular or cardiac disorders, e.g. myocardial infarction less than 6 months prior to dosing, congestive heart failure of New York Heart Association (NYHA) grade III or IV, severe arrhythmia * Relevant gastrointestinal tract surgery (except appendectomy, herniotomy, oesophagean varices) * Diseases of the central nervous system (such as epilepsy, seizures) or psychiatric disorders or neurological disorders * Evidence of hepatic encephalopathy related to chronic liver disease \> grade 2 (exclusion by Number Connection Test) * History of relevant orthostatic hypotension, fainting spells or blackouts * Resting heart rate in the awake subject below 45 beats per minute (BPM) or above 100 BPM; Systolic blood pressure below 100 mmHg or above 160 mmHg, Diastolic blood pressure above 95 mmHg * Chronic or relevant acute infections (e.g. HIV) except e.g. Hepatitis B and C * History of allergy/hypersensitivity (including drug allergies) that are deemed relevant to the trial as judged by the investigator * History or presence of allergy against iodine and/or contrast agent, latent or manifest hyperthyrosis or allergic diathesis to indocyanine green * Intake of drugs with a long half-life (\>24 hours) within at least one month or less than 10 half-lives of the respective drug prior to administration or during the trial, excluded are those drugs, the patient is currently taking for treatment of the hepatic or concomitant disease. * Change of chronic medication less than 4 weeks prior to dosing * Participation in another trial with an investigational drug within one month after previous single dose administration or two months after previous multiple dose administration prior to administration or during the trial * Smoker (more than 10 cigarettes or 3 cigars or 3 pipes per day) * Inability to refrain from smoking when confined to the study site on trial days * Alcohol abuse (more than 60 g/day in males, more than 40 g/day in females) * Drug abuse, in the investigator's judgement upon review of the patient's history and urine screening for abused substances * Veins unsuited for iv puncture on either arm (e.g. veins which are difficult to locate, access or puncture, veins with a tendency to rupture during or after puncture) * Blood donation (more than 100 mL within four weeks prior to administration or during the trial) * History of Gastro intestinal tract bleeding within the past 3 months * Excessive physical activities (within 48 hours prior to trial or during the trial) * Clinically relevant laboratory abnormalities (except for liver function tests according to Child-Pugh classification or laboratory constellations of parameters that are typically altered in patients fulfilling the Child Pugh criteria) including relevant electrolyte disturbances * Serum albumin \<20 g/L * Hemoglobin \<8 g/dL * Inability to comply with dietary regimen of study centre * Subjects not able to understand and comply with protocol requirements, instructions and protocol-stated restrictions Exclusion criteria specific for this study due to the known class side effect profile of ß2- mimetics (for healthy or hepatically impaired subjects): * Asthma or history of pulmonary hyperreactivity * Hyperthyrosis * Allergic rhinitis in need of treatment * Clinically relevant cardiac arrhythmia For female subjects (healthy or hepatically impaired): * Pregnancy or planning to become pregnant within 2 months of study completion * Positive pregnancy test * No adequate contraception in women of childbearing potential (adequate contraception: e.g. sterilisation, intrauterine device or oral contraception not containing ethinyl estradiol or ethinyl estradiol with an additional barrier method) for at least 3 months prior to participation in the study * Inability to maintain this adequate contraception during the whole trial period. * Lactation period