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This paper presents a low-cost method to continuously measure patient's electrocardiogram (ECG) signal and blood-oxygen saturation (SpO2) level. Hardware implementations of the designed ECG conditioning circuit and pulse oximeter are based on the use of commercially available devices. A user-friendly graphical user interface has been developed by using LabVIEW program to display and record incoming measurements. From the measured ECG curve and the pulse oximeter data, the heart rate and %SpO2 can be determined, respectively. In addition, the adjustable high/low heart rate and low %SpO2 alarm limits are provided for users. If the obtained heart rate exceeds the preset settings and %SpO2 level falls below its alarm limit, the audible alarms will be turn on. The probe-off alarm for measuring SpO2 level is also included. Resulting signals of all patients being continuously monitored can be transferred to a Central Monitoring Station and a Cardiac Center via local area network (LAN) in a hospital for diagnosis by experts later. To verify the performances of the proposed measurements, experimental results from measuring reference ECG waveforms and %SpO2 levels are given. [ABSTRACT FROM AUTHOR]