Internet of things-based health monitoring system for early detection of cardiovascular events during COVID-19 pandemic

Table 6 Negative prediction value of detection of the proposed system by cardiac arrhythmia classes

Class No.	LSTM	RST-LSTM	Class No.	LSTM	RST-LSTM
C1	96.74	98.14	C9	NaN	NaN
C2	84.27	86.45	C10	97.45	98.32
C3	98.79	99.16	C11	NaN	NaN
C4	97.56	98.87	C12	NaN	NaN
C5	98.23	98.12	C13	NaN	NaN
C6	90.29	92.64	C14	98.34	99.05
C7	NaN	NaN	C15	NaN	NaN
C8	NaN	NaN	C16	83.11	85.36
Average NPV	LSTM	93.86	Average NPV	RST-LSTM	95.12

NaN: Not a number; LSTM: Long short-term memory; RST: Rough set theory; NPV: Negative prediction value.